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Visualizing video at the speed of light — one trillion frames per second
 
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MIT Media Lab researchers have created a new imaging system that can acquire visual data at a rate of one trillion frames per second. That's fast enough to produce a slow-motion video of light traveling through objects. Video: Melanie Gonick/MIT Read more: http://web.mit.edu/newsoffice/2011/trillion-fps-camera-1213.html Project website: http://www.media.mit.edu/~raskar/trillionfps/ Follow us on Twitter: http://twitter.com/mitnews
WHAT IF YOU TRAVELED AT THE SPEED OF LIGHT?
 
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Subscribe! Because SMART IS THE NEW SEXY: https://goo.gl/JTfP6L How long does it take to get to… Space trips are one of the popular human dreams. Imagine that human techonolgies allow us to move with the speed of light 186,282 miles per second. Where can we go and how fast. And “Smart is the new sexy” have found that information. Do you want to know it? So, sit down and listen. We start. ---------------------------------------------------------------------------------------- Our Social Media: Facebook: http://facebook.com/enjoy.science/ The Bright Side of Youtube: https://goo.gl/rQTJZz 5-Minute Crafts Youtube: https://www.goo.gl/8JVmuC ---------------------------------------------------------------------------------------- For more videos and articles visit: http://www.brightside.me/
Views: 974392 SMART BANANA
How Fast Is Light?
 
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Light goes so fast that it broke our classical understanding of how speed works. We can fix our understanding with a little relativity and a space-time diagram, but you have to let go of any preconceived notions you might have about motion. ________________________________ VIDEO ANNOTATIONS/CARDS Complete Twins Paradox: https://youtu.be/UInlBJ4UnoQ Ultimate Guide to Relativity: https://youtu.be/FdWMM6aXpYE What Are Gravitational Waves? https://youtu.be/HmiPDvz0WVU What the HECK is a Photon?! https://youtu.be/73XdlgzSKws ________________________________ RELATED YOUTUBE VIDEOS PBS Space Time on Galaxy Collision: https://youtu.be/_P1xKh_kZFU ________________________________ HUGE THANK YOU TO THESE PATRONS ** Daniel Bahr, Ilya Yashin, Drake Dragon (TMDrake), Morgan Williams, Rick Finn, Kevin MacLean, David Bronakowski, Robert J Zapolis, Nicholas Ursa, Evgeny Ivanov ** ________________________________ SUPPORT THE SCIENCE ASYLUM Patreon: http://www.patreon.com/ScienceAsylum Advanced Theoretical Physics (eBook): https://gumroad.com/l/ubSc Merchandise: http://shop.spreadshirt.com/scienceasylum/ ________________________________ OTHER SOURCES https://www.jpl.nasa.gov/infographics/infographic.view.php?id=11489 https://home.cern/about/updates/2015/04/first-successful-beam-record-energy-65-tev https://physics.stackexchange.com/questions/43404/minkowski-diagram-hyperbola-and-invariant-quantity-of-relativity ________________________________ LINKS TO COMMENTS MusicalRaichu - Featured Comment: https://www.youtube.com/watch?v=UInlBJ4UnoQ&lc=UgyxXoFooiHYw1ghzIZ4AaABAg IoDavide1 - Featured Comment: https://www.youtube.com/watch?v=UInlBJ4UnoQ&lc=UgzyhI0A2-hn9BTq1YJ4AaABAg ________________________________ IMAGE CREDITS Juno Space Probe: https://commons.wikimedia.org/wiki/File:Juno_space_probe.jpg US Flag: https://commons.wikimedia.org/wiki/File:Flag_of_the_United_States.svg
Views: 47878 The Science Asylum
Energy & Electricity in Science : How Fast Does Light Travel?
 
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Light is a form of electromagnetic radiation, which always travels at a speed of 186,000 miles per second in a vacuum. Discover how light travels slower in transparent media with information from a science teacher in this free video on electromagnetic radiation and science lessons. Expert: Steve Jones Contact: www.marlixint.com Bio: Steve Jones is an experienced mathematics and science teacher. Filmmaker: Paul Volniansky
Views: 5303 eHow
What If You Run At The Speed of Light ?
 
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Views: 9577346 Meet Arnold
Light year, light second calculation explained!
 
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Light travels at a speed of 300,000 km/second. In this video we will learn how to calculate a light year. how to calculate light years how to calculate speed of light how to calculate distance between two points distance between earth and moon distance between earth and mars distance between earth and sun --- Click here if you want to subscribe https://www.youtube.com/user/TheRealSengupta
Views: 19187 Amit Sengupta
3 Things 'Faster Than Light'
 
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These 3 things go "faster" than the speed of light. How's that even possible? Subscribe: http://www.youtube.com/channel/UCj1gf... ↓Want more info?↓ More about the experiment: Marissa Giustina’s research: http://arxiv.org/abs/1511.03190 Advanced scientific note about Doppler: If there is a light moving away from you at constant velocity in static flat (Minkowski) space-time, no matter how red it is, you will never conclude it is going faster than light. But, here I am discussing the conclusions one might come to if you mistakenly use Doppler in the context of the curved space-time of the universe (where there is expansion). Interpreting the huge redshift as a result of the doppler effect, could make one think that galaxies we see are moving away at speeds approaching light speed. And since what we are actually seeing is light from those galaxies from billions of years ago, and given that the universe is expanding, you might be tempted to say that they have since "accelerated" to faster than the speed of light. You might go further and say that there are more distant galaxies that we can't see which are moving away even faster. So you might conclude there are galaxies moving faster than light in the universe. But the redshift isn't from doppler and this "acceleration" of the expanding universe isn't actually causing a true increase in velocity. Sometimes astronomers do say there is a faster than light "recession speed" by pretending the expansion of the universe is causing distant galaxies to move away from each other at a corresponding velocity, but that's misleading. In general relativity, you can actually have an increase in space between objects without causing a corresponding increase in the relatives velocities of those objects. CREDITS: Host, Writer, Animator, Editor: Greg Kestin From the producers of PBS NOVA © WGBH Educational Foundation Funding provided by FQXi Special thanks: Marissa Giustina Nick Hutzler Julie Elksy Byron Drury Jacob Barandes Tyler Howe Lissy Herman Ari Daniel Lauren Aguirre Kristine Allington Allison Eck Anna Rotschild MEDIA CREDITS: Music provided by APM: Deep_Science_No-perc Mysteries_of_Science_B Dreaming_of_the_Stars_a Curiosity_Kills_the_Cat_2 Conundrum_a Images: Stars - Rene Barrios Earth - Eirika galaxy spiral (by coornio - diviantart) Squirrel with scissors - 60811670 - Dollarphotoclub Equations - 91613623 - Dollarphotoclub Maxresdefault - Sean Stewart Marissa Giustina - Lammerhuber Tangled cat - David Swayze Cat doll - Vicky Somma Stock footage: train-exits-tunnel - Pond5 Bin_pulsar_442 - Courtesy of Nasa Expanding in space (40294) - Courtesy of Nasa WMAP_archive - Courtesy of Nasa
Views: 1762536 What The Physics?!
Speed Comparison 2 : Faster than Light
 
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Part 3 is up, thanks for the wait! : https://www.youtube.com/watch?v=rIvRzvIE9Xc Features Comparisons: Race 7: Earth to Mars Light USCSS Prometheus (Prometheus) Fireball XL5 (Fireball XL5) USCSS Nostromo (Alien) Whorfin Spacecraft (Star Trek) The Ark (Transformers) D5 Battle Cruiser (Star Trek) The USS Sulaco (Aliens) USS Enterprise (Star Trek) Pillar of Autumm (Halo) Race 8: Earth to Pluto X10 Pillar of Autumm (Halo) USS Voyager (Star Trek) Nomad Probe (Star Trek) Borg Cube (Star Trek) Prawn Mothership (District 9) Karla Five Vessel (Star Trek) Eagle 5 (Space Balls) Ascendant Justice (Halo) Moya (Farscape) The GunStar (The Last Starfighter) Race 9: Earth to Alpha Centauri The GunStar (The Last Starfighter) The Rodger Young (Starship Troopers) Galactica BS-75 (Battlestar Galactica) Axiom (Wall-E) Imperial II-Class Star Destroyer (Star Wars) Trimaxion Drone Ship (Flight of the Navigator) Samus Gunship (Metroid) Millenium Falcon (Star Wars) Bes'uliik Starfighter (Star Wars) Daedalus (Stargate) Fastest Animal Race - 100m: Hare Lion Horse Springbok Pronghorn Ostrich Cheetah King Cheetah Fastest Birds Race - 300m Grey-Headed Albatross Spur-Winged Goose Red-Breasted Merganser Eurasian Hobby Swift Gryfalcon Golden Eagle Peregrine Falcon Fastest Fishes Race - 100m: Great White Shark Blue Whale Killer Whale Bluefin Tuna Shortfin Mako Swordfish Sailfish Black Marlin Supercars Race - 1km Jaguar XJ220 McLaren F1 GTR Lamborghini Diablo Coatl Ferarri ZXX Evolution Saleen S7 Twin Turbo SSC Ultimate Aero TT Porsche 9FF GT9-VMAX Bugatti Veryon Supersport Hennessey Venom GT Koenigsegg One:1 Supersonic Planes Race, 3km Su-27SKM - Mach 2.35 F-111 Aardvark - Mach 2.4 F-15 Eagle - Mach 2.5 MiG-31 Foxbat - Mach 2.83 XB-70 Valkyrie - Mach 3 Bell X-2 Starbuster - Mach 3.19 MiG-25 Foxbat - Mach 3.2 Lockheed YF-12 - Mach 3.35 SR-71 Blackbird - Mach 3.5 X-15 - Mach 6.7 Race 10 - Earth to Andromeda Galaxy Garden Snail Light Daedalus (Stargate) Star Trek Top Speed (Star Trek) Star Wars Top Speed (Star Wars) Spaceball 1(Space Balls) Planet Express (Futurama) The Tardis (Dr Who) Flash (DC) Heart of Gold (Hitchhiker's Guide to the Galaxy) Note: Objects not drawn to scale. Objects are moving at their top speed without any acceleration forever. Sources: Interesting Article on spaceships top speed: https://www.fatwallet.com/blog/fastest-ship-in-the-universe/ (most of the research/credit comes from here) Warp Speed Calculator (http://www.anycalculator.com/warpcalculator.htm) http://memory-alpha.wikia.com/wiki/Warp_factor http://starwars.wikia.com/wiki/Hyperdrive/Legends http://memory-alpha.wikia.com/wiki/Maximum_warp http://www.migflug.com/jetflights/the-10-fastest-aircraft-in-the-world.html http://comicvine.gamespot.com/barry-allen/4005-22804/forums/flash-max-speed-704188/
Views: 12252696 Reigarw Comparisons
How Fast Light Travels?
 
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The speed of light in vacuum, commonly denoted c, is a universal physical constantimportant in many areas of physics. Its exact value is 299,792,458 metres per second(approximately 300,000 km/s (186,000 mi/s). For more information, click this link: https://www.google.com/amp/s/amp.space.com/15830-light-speed.html
Views: 80 Think Insights
How Many Seconds Does Light Travel In A Year?
 
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You start with the speed of light, which is about 186,000 miles per second. How fast does light travel in one year, and how is it calculated many seconds a year? Youtube. If you are wondering, there just about 31,500,000 seconds in a year, and if multiply this by 186,000 (the distance that light travels each second), get 5. Remember, this is when the planets are closest to one another. Html "imx0m" url? Q webcache. If you could travel at the speed of light, circle globe earth almost eight times in one second 28 aug 2017 how can we comprehend distances to stars? This post explains light years terms a scale miles and kilometers. Any other time it will take even in the first problem you can see that multiplying by a positive power of ten indicates how many decimal places to right one must move point obtain normal light year is distance travels. In miles per hour, light speed is, well, a lot about 670,616,629 mph but i'll assume that you meant to ask how far does travel in one year. For example, the galaxy m109 is 27 oct 2015 rays of light that leave your screen when you start watching this video will go a long way before it finishes 23 aug as such, we measure cosmic distances according to how fast can travel in year. Googleusercontent search. Bbc earth how far does light travel in 60s? . Multiples of the light second can be defined, although apart from year they are more used in popular science publications than research works. Does light travel in 1 second? Quora how fast does travel? . 23 mar 2016 the speed of light is a constant. Nothing can travel faster than that. Stars other than our sun are so far 24 feb 2017 it was einstein who first demonstrated theoretically that light is the fastest thing in universe, travelling vacuum of space at a whopping 300,000km per second (or 186,000 miles second, depending on which side atlantic you stand). If light travels at a speed of 186,000 miles second how many are there in year? Does travel 1 second? Quora. What is a light year? Ucsb science linehomework #1 solutions. Light the average distance from earth to sun is 499. 4605 10^15 meters or 9,500,000,000,000 kilometers or 5,900,000,000,000 miles or 63,279 au. Think of it as you're using how long will take you to get there a substitute for far away are. (600,000,000 kilometers) (300,000 kilometers second)about 33 minutes. We can calculate this by multiplying the speed of light 1 year (or 3. The speed of light is roughly 300,000 kilometers per second 15 apr 2013 the short answer that it takes sunlight an average 8 minutes and 20 seconds to travel from sun earth. The speed of light space. The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers second), and theory nothing can travel faster than. For example, a light minute is 60 seconds and the average distance from earth to sun it really an incredibly long lightyear roughly 6 trillion miles or nearly 10 kilometers. Here's how you calculate it. Not only does it allow us therefore ligh
Views: 30 new sparky
'Sonic Boom' Of Light Captured For The First Time Ever
 
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Scientists used a camera that can capture 100 BILLION frames per second in a single exposure to capture a "sonic boom" of light! Was Einstein Wrong About The Speed Of Light? - https://youtu.be/klM4MutLG0k Sign Up For The Seeker Newsletter Here - http://bit.ly/1UO1PxI Read More: NASA Armstrong Fact Sheet: Sonic Booms https://www.nasa.gov/centers/armstrong/news/FactSheets/FS-016-DFRC.html "A sonic boom is the thunder-like noise a person on the ground hears when an aircraft or other type of aerospace vehicle flies overhead faster than the speed of sound or supersonic. Air reacts like a fluid to supersonic objects. As objects travel through the air, the air molecules are pushed aside with great force and this forms a shock wave much like a boat creates a bow wave. The bigger and heavier the aircraft, the more air it displaces." Ultrafast Camera Captures 'Sonic Booms' of Light for First Time http://www.livescience.com/57572-ultrafast-camera-captures-sonic-booms-of-light.html "Just as aircraft flying at supersonic speeds create cone-shaped sonic booms, pulses of light can leave behind cone-shaped wakes of light. Now, a superfast camera has captured the first-ever video of these events." Scientists Capture a "Sonic Boom" of Light http://www.smithsonianmag.com/smart-news/scientists-capture-sonic-boom-light-180961887/ "Choi reports that optical engineer Jinyang Liang and his colleagues fired a green laser through a tunnel filled with smoke from dry ice. The interior of the tunnel was surrounded by plates made of silicone rubber and aluminum oxide powder. The idea was that, since light travels at different rates through different materials, the plates would slow down the laser light, which leave a cone-shaped wake of light." ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos daily. Watch More DNews on Seeker http://www.seeker.com/show/dnews/ Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel Seeker on Twitter http://twitter.com/seeker Trace Dominguez on Twitter https://twitter.com/tracedominguez DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ https://plus.google.com/u/0/+dnews Seeker http://www.seeker.com/ Sign Up For The Seeker Newsletter Here: http://bit.ly/1UO1PxI Written By: Emily Calandrelli
Views: 783798 Seeker
What If You Traveled Faster Than The Speed Of Light?
 
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The speed of light might seem fast, but what if you went faster than it? Download the new FireFox here: https://mzl.la/lifenoggin Subscribe: https://bit.ly/SubLifeNoggin | Get your exclusive Life Noggin merch: http://keeponthinking.co Support Life Noggin on Patreon: https://patreon.com/LifeNogginStudios Follow Life Noggin! Facebook: https://facebook.com/LifeNoggin/?ref=br_rs Instagram: https://instagram.com/lifenoggin/ Twitter: https://twitter.com/lifenoggin Official Website: https://lnstudios.co/ Watch More Life Noggin: Latest Uploads: https://youtube.com/watch?v=4A6XkYpmidU&list=PL8L0MzSk_V6JtEDRfRMyb6rFd1acqYSlO Big Questions: https://youtube.com/watch?v=rJTkHGXMdb0&list=PL8L0MzSk_V6LtaKh-Eqj7Cs4Tmf5iQPx4 Outer Space: https://youtube.com/watch?v=rJTkHGXMdb0&list=PL8L0MzSk_V6IPWXQvW3Exk9bqGzOdj8Qq Inside the Human Body: https://youtube.com/watch?v=FVnnM6hZ7Wk&list=PL8L0MzSk_V6JoZQ-Sy3eK2rjiDsamxCQs Popular Videos: https://youtube.com/watch?v=1bVfzBD-40E&list=PL8L0MzSk_V6IYeU-cNGR6NYHW19GMiPNy We are LIFE NOGGIN! An animated and educational web show designed to teach you all about your awesome life and the brain that makes you able to live it! We answer questions about everything from inside the human body to deep outer space. Stay tuned for more videos on every Monday and Thursday! Keep On Thinking. Life Noggin Team: Director/Voice: http://lifenogg.in/PatGraziosi Executive Producer - Ian Dokie: http://instagram.com/iandokie Director of Marketing: http://lifenogg.in/JaredOban Animation by Robert Grisham Written by Michael Sago: https://twitter.com/MichaelSago Sources: ftp://umpgal.gsfc.nasa.gov/pub/daac_ozone/Lecture4/Text/X/whatislight.html https://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html https://www.grc.nasa.gov/WWW/k-12/Numbers/Math/Mathematical_Thinking/how_fast_is_the_speed.htm https://www.space.com/37244-why-is-the-speed-of-light-so-slow.html http://www.bbc.com/news/uk-scotland-glasgow-west-30944584 http://micro.magnet.fsu.edu/primer/java/speedoflight/ http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/refr.html https://www.youtube.com/watch?v=VNv0Yzk00qg https://www.britannica.com/science/Cherenkov-radiation https://www.scienceabc.com/pure-sciences/cherenkov-radiation-is-there-a-sonic-boom-equivalent-for-light.html http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/cherenkov.html https://www.space.com/24701-how-long-does-it-take-to-get-to-mars.html https://sservi.nasa.gov/articles/how-far-is-it-to-mars/ https://exoplanets.nasa.gov/trappist1/ https://www.space.com/35796-trappist-1-alien-planets-travel-time.html http://www.trappist.one/#about http://www.phy.olemiss.edu/HEP/QuarkNet/time.html https://www.britannica.com/science/time-dilation
Views: 1314352 Life Noggin
How Many Seconds Does Light Travel In A Year?
 
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The speed of light space 15830. In one second, light travels exactly 299,792,458 meters (in a vacuum), by definition what would happen if i could travel at 1 lightyear per second? If speed of for distance year, how much will age in that duration? . Here's how you calculate it. Apr 15, 2013 photons emitted from the surface of sun need to travel there are galaxies millions light years away, which means we're earth sun! problem 1 travels at a speed 300,000 km sec. Why does r i meters per second. A light second is the distance travels in one second, or 7. If you could travel at the speed of light, go around earth 7. In order to calculate apr 24, 2017 astronomers define a light year as the distance travels in one. How far does light travel in a year? Universe today. What is a light year and how long 1 year? Physlink. And why? There is not much to collide with in empty space, so light travels fastest space. Html url? Q webcache. Times is of objects transmitted that light a million or more years long!. How far does light travel in 1 second? Quora. Here is an article on the speed of light and years doing math, a year 9. From earth to the sun! problem 1 light travels at a speed of 300,000 km sec. How long does it take sunlight to reach the earth? Phys. Googleusercontent search. Exploring the stars in orion light year madness!how long does it take for from sun travel to earth exploring madness! space math scientific notation and speed of radio jove. How long does it take light to travel a) the moon at a distance of 380,000 km? . May 22, 2012 the speed of light in a vacuum is 186,282 miles per second (299,792 kilometers second), and theory nothing can travel faster than. Then you multiply that by 3,600 seconds in an hour if were traveling at the speed of light could fly around world 7 and a half times we'll need to know circumference planet earth how far travels second. How far can light travel in one year and why? Quora. We can calculate this by multiplying the speed of light 1 year (or 3. The speed of light space. You start with the speed of light, which is about 186,000 miles per second. How fast does light travel? . In miles per hour, light speed is, well, a lot about 670,616,629 mph. The standard symbol for the speed of light is c, so we can write example problem how long does it take radio waves to travel from earth moon, a 1 day ago he did this by relating year astronomical unit sun distance. Light can travel at a speed of 300,000 km (186,000 miles) second. That means that in one let's see how many light minutes earth is from the sunDoes travel? . How far is a light year? Light distance to jupiter. Bbc earth how far does light travel in 60s? . Light distance (or radio distance) to jupiter light travels at 300,000 kilometers sec. 1557 10^7 seconds) to it really is an incredibly long distance a lightyear is roughly 6 trillion miles or nearly 10 trillion kilometers. Science on the brain how far is a lightyear? Marshall. It is defined as the distance tha
Views: 162 Put Put 1
Light Speed or 186,000 Miles/Second Visualized (My) Low-Budget Style
 
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since the speed of light is equivalent to roughly 7 times around the world in one second, i thought this was a good example of what that would look like (give or take several millions of miles per hour). this is a scene from "superman: the move" when he gets a bit upset after lois dies. enjoy, or else!
Views: 1176 ScotSpeed
Light in Slow Motion
 
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From MIT: "MIT researchers have created a new imaging system that can acquire visual data at a rate of one trillion exposures per second. That's fast enough to produce a slow-motion video of a burst of light traveling the length of a one-liter bottle, bouncing off the cap and reflecting back to the bottle's bottom." "The pulse of light is less than a millimeter long. Between each frame, the pulse travels less than half a millimeter. Light travels a foot in a nanosecond and the duration of travel through a one foot long bottle is barely one nanosecond (one billionth of a second)." For more info and videos see the MIT trillion-frame-per-second video project website: http://web.media.mit.edu/~raskar/trillionfps/
Views: 215113 ronnievalencia
Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting
 
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View full lesson: http://ed.ted.com/lessons/how-do-we-measure-distances-in-space-yuan-sen-ting When we look at the sky, we have a flat, two-dimensional view. So how do astronomers figure the distances of stars and galaxies from Earth? Yuan-Sen Ting shows us how trigonometric parallaxes, standard candles and more help us determine the distance of objects several billion light years away from Earth. Lesson by Yuan-Sen Ting, animation by TED-Ed.
Views: 892962 TED-Ed
Light travels in a straight line? (Let's find out)
 
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An experiment using a tank of water with added milk powder to act as a diffuser to find out how light travels. Demonstrations include a krypton torch (yellow light), an LED torch (white light) and a laser light., (The video is made to illustrate that light travels in a straight line for primary school students.)
Views: 57122 SG Primary Science
Imaging at the Speed of Light
 
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To read the full paper, please visit: http://www.nature.com/lsa/journal/v6/n3/full/lsa2016256a.html Tiny micro- and nanoscale structures within a material’s surface are invisible to the naked eye, but play a big role in determining a material’s physical, chemical, and biomedical properties. Over the past few years, Chunlei Guo and his research team at the University of Rochester have found ways to manipulate those structures by irradiating laser pulses to a material’s surface. They’ve altered materials to make them repel water, attract water, and absorb great amounts of light—all without any type of coating. Now, Guo, Anatoliy Vorobyev, and Ranran Fang, researchers at the University’s Institute of Optics, have advanced the research another step forward. They’ve developed a technique to visualize, for the first time, the complete evolution of micro- and nanoscale structural formation on a material’s surface, both during and after the application of a laser pulse. “After we determined that we could drastically alter the property of a material through creating tiny structures in its surface, the next natural step was to understand how these tiny structures were formed,” Guo says. “This is very important because after you understand how they’re formed you can better control them.” Having that control will open the way for improvements in all kinds of technologies, including anti-corrosive building materials, energy absorbers, fuel cells, space telescopes, airplane de-icing, medical instrumentation, and sanitation in third world countries. In a paper published in the Nature journal Light: Science & Applications, the group introduced a scattered-light imaging technique that allows them to record an ultrafast movie of the ways in which laser radiation alters a material’s surface. The technique opens a window on the entire process, from the moment a laser hits the material to melting, transient surface fluctuations, and resolidification resulting in permanent micro- and nanostructures. It currently takes about an hour to pattern a one-inch by one-inch metal sample. Identifying how micro- and nanostructures form has the potential to allow scientists to streamline the creation of these structures—including increasing the speed and efficiency of patterning surfaces. Creating and altering these small structures makes properties intrinsically part of the material and reduces the need for temporary chemical coatings. To produce these effects, researchers use a femtosecond laser. This laser produces an ultra-fast pulse with a duration of tens of femtoseconds. (A femtosecond is equal to one quadrillionth of a second.) Changing the laser’s conditions causes changes in the morphological features of the surface structures— such as their geometry, size, and density—leading the material to exhibit various specific physical properties. It is difficult to obtain detailed images and movies of events in micro- and nanoscales because they occur during a matter of femtoseconds, picoseconds (one trillionth of a second), and nanoseconds (one billionth of a second). To put this into perspective: Vorobyev explains that it takes about one second for light to travel from Earth to the moon. However, light travels only about one foot in a nanosecond and approximately 0.3 micrometers in a femtosecond, which is a distance comparable to the diameter of a virus or bacteria. A typical video camera records a series of images at a rate of five to 30 frames per second. When playing the series of images in real time, human eyes perceive continuous motion rather than a series of separate frames. So how was Guo’s team able to record frames at an interval of femtoseconds, picoseconds, and nanoseconds? They used a technique involving scattered light. During a femtosecond laser pulse, the beam is split in two: one pump beam is aimed at the material target in order to cause micro- and nanostructural change, and the second probe beam acts as a flashbulb to illuminate the process and record it into a CCD camera—a highly-sensitive imaging device with high-resolution capabilities. “We worked very hard to develop this new technique,” Guo says. “With the scattered light pulsing at femtosecond time intervals, we can capture the very small changes at an extremely fast speed. From these images we can clearly see how the structures start to form.” Guo explains that this scattered light visualization technique has applications for capturing any process that takes place on a minute scale. “The technique we developed is not necessarily limited to just studying the surface effects produced in my lab. The foundation we laid in this work is very important for studying ultrafast and tiny changes on a material surface.” This includes studying melting, crystallography, fluid dynamics, and even cell activities. This research was supported by the US Army Research Office and the Bill & Melinda Gates Foundation.
What if the Speed of Light is Just Not Enough?
 
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What if faster than light travel is impossible? Light travels so fast that it can orbit the earth 7 times in 1 second, but what if it's not fast enough? what if the speed of light is the maximum speed in the universe, and yet it's still not enough, due to the fact that our universe is just "too massive". What if faster than light travel is impossible? And what if the speed of light is just not enough? What if the speed of light is just not enough? SUBSCRIBE - http://bit.ly/R1vvcg SHARE THIS VIDEO - http://on.fb.me/1iGkIvy --------------- Check out our website - http://plethrons.com Like us on Facebook - https://www.facebook.com/PlethronsChannel Follow us on Twitter - https://twitter.com/plethrons --------------- This video is based on another YouTube video by Sharkee - (https://www.youtube.com/AhSharkee) The original video - https://www.youtube.com/watch?v=3WtgmT5CYU8 --------------- Music - Hope in U by Semaphore http://www.newgrounds.com/audio/listen/427118 --------------- References: Warp Drives - http://www.nasa.gov/centers/glenn/technology/warp/warpstat_prt.htm Speed of light - http://en.wikipedia.org/wiki/Speed_of_light Helios (spacecraft) - http://en.wikipedia.org/wiki/Helios_probes List of vehicle speed records - http://en.wikipedia.org/wiki/List_of_vehicle_speed_records ---------------
Views: 10914 Plethrons
Speed of Light: How Does Light Travel?
 
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Watch this video to learn more about the Speed of Light. See this and over 140+ engineering technology simulation videos at http://www.engineertech.org. Simulations provided free under a Department of Labor grant awarded Eastern Iowa Community Colleges. To learn more visit http://www.eicc.edu.
Do You Really Think The Speed Of Light Is Fast?
 
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Is the speed of light fast? Based on humanity's current ability to travel, the speed of light is abundantly fast. I want to make some comparisons so we can understand how fast light is. The world record for a human being to run 1 mile is 3:43 seconds. In one second, light will travel 186,000 miles. If a person could run at the record pace of 1 mile every 3:43 seconds, it would take that person 1 year, 16 weeks of non-stop running to go the distance light travels in only one second. The world record for the fastest car is held by Thrust SSC that reached 763 mph, that's 1 mile every 4.7 seconds. At that speed it would take just under 10 days and 4 hours to travel as far as light can travel in just one second. The worlds fastest airplane is the SR-71 Black Bird which is a cold war era spy plane that reached a top speed of 2,193 mph. That is 1 mile every 1.6 seconds. At that speed it would take about 3 days and 13 hours to go the distance light travels in only 1 second. The world's fastest man made vehicle that a person can ride is the Saturn 5 rocket. It was used to launch man into space and to the surface of the moon during the Apollo Moon missions. It reached speeds of slightly more than 25,000 mph, or about 7 miles a second. Even at that speed, light is still almost 27,000 times faster. The world's fasted man made object is Juno, an unmanned spacecraft that was sent to Jupiter. It reached a speed of 165,000 mph or about 46 miles per second, but it is still over 4,000 times slower than light. This must mean light is pretty fast, right? Well, speed is relative and the concept of something being fast or slow is based on what we compare it to. If we consider the speed of light when it comes to traveling here on earth, then yes, light is very fast. In fact, light could travel around the earth more than 7 times in just one second. However the earth is small when compared to the infinite size of space. Earth is about 93 million miles from our sun. It takes the light created by our sun, about 8 minutes and 20 seconds to reach earth. The name of the solar system we live in is the Sol System. The Sol system is around 3,666,000,000 miles across. It would take light around 5.5 hours to travel that distance. But we need to keep in mind the Sol System, our solar system makes up but a tiny spec of our galaxy. The Milky Way Galaxy that we live in, is 587 quadrillion miles across or 587 thousand, trillion miles. Numbers this large is hard to put into perspective being that we aren't accustom to using them. 587 quadrillion miles is such a long distance that even with light being as fast as it is, it would still take about 100,000 years to travel that distance. Even if we were able to travel a thousand times faster than the speed of light, it would still take 100 years to travel across our galaxy. It is estimated that there are 500 billion galaxies in the universe. With them being millions of parsecs away from each other and a parsec being 19.25 million miles, the speed of light is simply way too slow for space travel, unless you only plan on remaining in our solar system. Even if we were to travel to our nearest neighbor, the star we call Proxima Centauri, it would take 4.2 years at the speed of light. Is the speed of light fast? Not even close.
Views: 10376 Chris Newman
What Is A Light Second?
 
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Light second wikipedialight conversion chart distance and length converter light definition of by the free dictionary. What is a light year astro observer. What is the mass of earth ? . How far? big many. 86310 5 miles, average distance from light minute, 60 light seconds, 1. Homework #1 solutions. Since there are 22 feb 2017 the moon is a little over one light second from earth, meaning it would take beam of on earth more than to reach 24 learn and understand about what year how long with measured in seconds, minutes years what's name this number (i. Light minutes away (93,000,000 miles) 22 may 2012 the speed of in a vacuum is 186282 miles per second (299792 like sound, can be slowed depending on what it traveling through so to measure really long distances, people use unit called year. Question 1 light year is equal to how many years of the earth? Yes, you have fallen into it would be better say moon. That distance would be a light second since that is how far can travel in. The speed of light space. 11810 7 miles what's kilgrave doing in season 2 of 'jessica jones'? What if an asteroid hit the earth how 'fast' is the speed of light? Multiply the length of the line by 7. Moon is just what does a light year mean, as in 300 years from earth? How many 9 nov 2009 contrary to think, actually measurement of distance, considering travels at 186,282 miles per second and. Light second wikipedia the light is a unit of length useful in astronomy, telecommunications and relativistic tools. What links here related changes upload file special pages permanent link page information wikidata item cite this units of distance a light year is the signal traverses during one flight time, second it in second, and so on conversion chart for (astronomical, length). Therefore so, let s see (pun!) what this would be. Light travels at 186,000 miles per second (300,000 kilometers second). What is a light year? Farmers' almanac. How fast does light travel? . 20 feb 2013 if you like to keep up with what's going on in astronomy, it's worth travel to the moon takes about a second and a half, at light speed light second, 2. Instant units and measurements conversion, metric other systemslight second the distance light travels in a vacuum one second; Related to minute, day what on earth is quasar? . What is a light year? year and how long 1 Physlink. Here is a the sun 8. Space travel is measured in light years, but what's a ajc. Light seconds away (240,000 miles). How many million, billion, trillion, etc. Which is the biggest of sun's planets? Jupiter it 10 times earth's diameter. Seeing' the earth, moon, and sun to scale glenn research center. Light travels at 186,000 miles every second! that is a huge number! if you were to write one number per second for light can travel around the earth 7 times in. Is this)? If light travels at a speed of 186,000 miles second how many are there 22 feb 2017 the moon is little over one from earth, meaning it would take beam on earth more th
Views: 11 Put Put 1
Why can't you go faster than light?
 
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One of the most counterintuitive facts of our universe is that you can’t go faster than the speed of light. From this single observation arise all of the mind-bending behaviors of special relativity. But why is this so? In this in-depth video, Fermilab’s Dr. Don Lincoln explains the real reason that you can’t go faster than the speed of light. It will blow your mind.
Views: 1534281 Fermilab
The Speed Of Light in Air and Water 1959 PSSC; William Siebert, MIT; Physics Tutorial
 
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Physical Science Study Committee Films (PSSC) playlist: https://www.youtube.com/playlist?list=PL_hX5wLdhf_KuXqv0QzMoNQYgR_nBxETx Physics & Physical Sciences playlist: https://www.youtube.com/playlist?list=PL_hX5wLdhf_JKIMNk88rKCkhpK73_qmHY "Shows Dr. William M. Siebert outdoors at night as he measures the speed of light in air using a spark-gap, parabolic mirrors, a photocell, and an oscilloscope. In the laboratory he compares speed in air and in water using a high speed rotating mirror." Originally a public domain film, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). https://en.wikipedia.org/wiki/Speed_of_light Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/ The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is 299,792,458 metres per second (approximately 3.00×108 m/s, approximately 186,282 mi/s); it is exact because the unit of length, the metre, is defined from this constant and the international standard for time. According to special relativity, c is the maximum speed at which all conventional matter and hence all known forms of information in the universe can travel. It is the speed at which all massless particles and changes of the associated fields (including light, a type of electromagnetic radiation, and gravitational waves) travel in vacuum. Such particles and waves travel at c regardless of the motion of the source or the inertial reference frame of the observer. In the theory of relativity, c interrelates space and time, and also appears in the famous equation of mass–energy equivalence E = mc2. The speed at which light propagates through transparent materials, such as glass or air, is less than c; similarly, the speed of radio waves in wire cables is slower than c. The ratio between c and the speed v at which light travels in a material is called the refractive index n of the material (n = c / v). For example, for visible light the refractive index of glass is typically around 1.5, meaning that light in glass travels at c / 1.5 ≈ 200,000 kilometres (120,000 mi) /s; the refractive index of air for visible light is about 1.0003, so the speed of light in air is about 299,700 kilometres (186,200 mi) /s (about 90 kilometres (56 mi) /s slower than c). For many practical purposes, light and other electromagnetic waves will appear to propagate instantaneously, but for long distances and very sensitive measurements, their finite speed has noticeable effects. In communicating with distant space probes, it can take minutes to hours for a message to get from Earth to the spacecraft, or vice versa. The light seen from stars left them many years ago, allowing the study of the history of the universe by looking at distant objects.... Ole Rømer first demonstrated in 1676 that light travels at a finite speed (as opposed to instantaneously) by studying the apparent motion of Jupiter's moon Io. In 1865, James Clerk Maxwell proposed that light was an electromagnetic wave, and therefore travelled at the speed c appearing in his theory of electromagnetism. In 1905, Albert Einstein postulated that the speed of light c with respect to any inertial frame is a constant and is independent of the motion of the light source. He explored the consequences of that postulate by deriving the theory of relativity and in doing so showed that the parameter c had relevance outside of the context of light and electromagnetism. After centuries of increasingly precise measurements, in 1975 the speed of light was known to be 299792458 m/s (186,282 mi /s) with a measurement uncertainty of 4 parts per billion. In 1983, the metre was redefined in the International System of Units (SI) as the distance travelled by light in vacuum in 1/299792458 of a second. As a result, the numerical value of c in metres per second is now fixed exactly by the definition of the metre... In a medium In a medium, light usually does not propagate at a speed equal to c; further, different types of light wave will travel at different speeds. The speed at which the individual crests and troughs of a plane wave (a wave filling the whole space, with only one frequency) propagate is called the phase velocity vp. An actual physical signal with a finite extent (a pulse of light) travels at a different speed. The largest part of the pulse travels at the group velocity vg, and its earliest part travels at the front velocity vf...
Views: 8534 Jeff Quitney
The speed of light
 
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Light travels at 300,000 km per second. The circumference of earth is about 40,000 km, so light could travel around the globe 7.5 times in one second, and could go 6,000,000 km in the time it takes you to watch this video. WANT MORE TIPS? Search for #LearnPlentyIn20 on Twitter. KEEP IN TOUCH Blog: espirian.co.uk/blog/ Twitter: @espirian LinkedIn: linkedin.com/in/johnespirian/ DON'T MISS A POST Join my free Espresso mailing list at espirian.co.uk/espresso/
Views: 16 John Espirian
Riding Light - Traversing the Solar System at the speed of light
 
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Ever imagined what it would be like to traverse the Solar System at the speed of light? This is a video which attempts to re-create the out-of-this world experience. The ultimate ride begins on the surface of the sun, hurling you outwards at 186,000 miles per second, past the orbiting planets, the asteroid belt, until finally the sun appears as a faint glimmer among a sea of other stars. Enjoy
Views: 420700 ogniank
Light travels in a straight line
 
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DeltaStep is a social initiative by graduates of IIM-Ahmedabad, IIM-Bangalore, IIT-Kharagpur, ISI-Kolkata, Columbia University (USA), NTU (Singapore) and other leading institutes. At DeltaStep, we understand that just like every child has a unique face, a unique fingerprint; he has a unique learning ability as well. Hence we have built an intelligent adaptive learning system that delivers a tailor-made learning solution and helps a student to learn at his own pace because when it comes to learning, one size does not fit all. Learn from 1000s of such interesting videos, practice from more than 1,00,000 questions, learn complex concepts through games, take timed tests, get detailed reports & in-depth analysis even via SMS and Whatsapp and many more amazing features. Class wise mapping available for all leading boards including ICSE and CBSE. Create your personal learning account. Register for FREE at www.deltastep.com.
Views: 8109 DeltaStep
Stephen Hawking - Rocket to the Future
 
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Stephen Hawking examines how we may some day, travel to the future. Into The Universe With Stephen Hawking - Time Travel This video belongs to Discovery Communications and is being used for educational purposes only
Views: 2887197 WeAreStarStuff51
Science Video for Kids: How Does Light Travel?
 
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The best and the biggest channel for science videos for kids. Light can bounce off when it hits objects and it can bend also while passing through from one . reflection and refraction of light. Light travels in waves. Light rays cannot bend to go around something. The light rays are either reflected, absorbed, or refracted. Watch out this video to . For more information: [email protected] [email protected] .
Views: 1821 Kelly Toney
How Long Is A Light Year In Days?
 
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Million similar lines end to. How far is a light year? What Find out. How long is a light year in days? Youtube. How long would it take to walk a light year? Futurism. How long is a light year? Nasa. The light year is a unit of length used to express astronomical distances. Then you multiply that by 3,600 seconds in an hour let's work out how far a light year is. 24 feb 2017 the speed of light is sometimes referred to as the 'cosmic speed limit'. Now, read more in the video, you have a chance to see how far lightyear is. 461 pmabout 63240 astronomical units or about 0. A light year is equal to 9460730472580. 88 billion miles 10 mar 2013 once you start counting in trillions, using kilometers and miles becomes really impractical, so using the distance light travels in a year is a good way to measure very large distances. It really is an incredibly long distance a lightyear roughly 6 trillion miles or nearly 10 kilometers. Because distances across the universe are so large, astronomers use light years. It is the distance that light can travel in one year. Now speed distance time so. How far is that? Multiply the number of seconds in one year by miles or kilometers that light travels second, and there you have it. Without if you want to know the distance of a light year in kilometers, will need find speed kilometers per second 13 nov 2009 is 5,878,625,373,183. Each hour has 60 minutes and each minute is seconds long. If you hoofed it at a moderate pace of 20 minutes mile, would take 225 million years to complete your journey (not including stops for meals or light year is unit distance. This many seconds is an even larger number than the of miles light goes in one second! it would take you three years to get 28 aug 2017 a year distance travels. 5 (the corresponding distance is one light second), then place 31. As such, we measure cosmic distances according to how fast light can travel in a year. The speed of light 300,000,000 m s (300 10 8 s). So 1 light year 300 10 8 315 7 30 aug 2013 here's how it breaks down one the distance travels in year, used as yardstick for interstellar distances is about 5. As a point of comparison, it takes 8 minutes for light from the sun (93 million miles away) to reach us, and our galaxy is little. It's defined by how far a beam of light travels in one year distance six trillion miles. The exact length of so far, physicists have assumed that it is impossible to directly access the characteristics ground state empty space. 50 billion kilometers or 5. And a light year is 63,241 astronomical units (1 unit, or au the average distance from earth to sun). Light year wikipedia en. How long is a light year? The daily dot. Route 20, which is 3,365 miles in length. A light year is a measure of distance equal to how far travels in one earth. You start with the speed of light, which is about 186,000 miles per second. Here's how you calculate it. More precisely, one light year is equal to approx 9. Note 1] as defined by the internat
Views: 103 Aile Aile
How Far Does The Speed Of Light Travel In A Year?
 
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If you did this going an average speed of 60 miles per hour will need one year and feb 19, 2014. How long is a light year? The calculator site. Light can travel at a speed of 300,000 km (186,000 miles) second. How far does light travel in a year? Universe today. The speed of light space. You start with the speed of light, which is about 186,000 miles per second. Light year is the distance that light travels in one, find and how long 1 year? Physlink. How far can light travel in one year and why? Quora how does a year? Universe today universetoday 1 class "" url? Q webcache. Jul 3, 2017 diagram showing the distance light travels between sun and earth. How far can light travel in one year and why? Quora. Therefore, it has if light travels at a speed of 186,000 miles second how many are there in year long ago did the dinosaurs go extinct (65 million years ago)? May 3, 1999 'ultimate limit' according to einstein's theory special one (l. 397 miles s a light year is defined as the distance that light can travel in 1 year. Through the universe at speed of light cass, ucsd. The speed of light is roughly 300,000 kilometers per second (km s), and years are terms that commonly used in astronomy, but what they do mean? Light how fast travels if a year the distance one, find google says light, c 299,792,458 m s 186,282. How far can light travel in one year and why? Quorahow is a year? to calculate distance of how fast the speed. In miles per hour, light speed is, well, a lot about 670,616,629 mph. That means that in one how far do you think light travels a minute? To figure this out, feb 22, 2017 while year has nothing to with time as we know it on earth, does measure the distance travels, or takes if people could travel at speed of light, they would be able circle is will. Scientific notation and the speed of light radio jovespace travel is measured in years, but what's a length year math forum ask drwhat year? Homework #1 solutions. How far will light from a star travel in one year? Space youtube. Here's how you calculate it. How fast does light travel? . Times in one second light travels at 'the speed of light' which has been measured to be about doing the math, a year is 9. That is a tougher question it does link in to other physics but mainly we don't the speed of light vacuum, commonly denoted c, universal physical constant important medium, usually not propagate at equal c; Further, different types wave year distance travels one year, around 9461 billion kilometres, 5879 miles, or 0. Googleusercontent search. Calculating the speed of light has been a preoccupation for it really is an incredibly long distance lightyear roughly 6 trillion miles or nearly 10 kilometers. 3066 parsecs aug 28, 2017 he did this by relating the light year to the astronomical unit the earth sun distance. If you could travel at the speed of light, would be able to circle earth's a light year is distance travels in one apr 24, 2017 astronomers define as. Is the distance that l
Views: 139 A Big Question II
Calculate time it takes for light to reach the earth from the sun
 
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In this video I use the formula velocity is distance divided by time. In actual fact the formula "v=d/t" should be "s=d/t". Speed is distance divided by time which a scalar quantity (that just means the direction is not specified). However as I was teaching this for Swedish pupils and they are used to using the symbol "s" as distance (sträcka, in Swedish)and the symbol "v" for speed. Therefore I have used the symbol "v" - here, so as not to confuse my pupils..... Velocity is also distance divided by time, however in velocity the direction of travel should be given, because velocity is a vector quantitiy where direction is given in the question
Views: 12028 Wendy maths Isacsson
Light | The Dr. Binocs Show | Learn Videos For Kids
 
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Hey Kids, have you ever thought what would we do without lights? Well, Dr. Binocs is here to light up your tickling brain cells. Watch the video so as to know interesting facts about light! The detailed video break-up is given below 00:24 – What is Light? 00:32 – How does light travel? 00:47 – Transparent Object 01:08 – Opaque Objects 01:31 – Translucent Object 02:17 – Refraction 02:49 – Trivia Time Voice Over Artist - Joseph D'Souza Script Writer - Sreejoni Nag Director - Aashka Shah Visual Artists - Aashka Shah, Pranav Korla Illustrators - Aashka Shah, Pranav Korla Animators - Tushar Ishi, Rupesh Hire, Digamber Bhadre VFX Artist - Swapnil Ghoradkar Background Score - Jay Rajesh Arya Sound Engineer - Mayur Bakshi Creative Head - Sreejoni Nag Producer: Rajjat A. Barjatya Copyrights and Publishing: Rajshri Entertainment Private Limited All rights reserved. Share on Facebook - http://goo.gl/7k7Kxi Tweet about this - http://goo.gl/WDfrOk Catch Dr.Binocs At - https://goo.gl/SXhLmc To Watch More Popular Nursery Rhymes Go To - https://goo.gl/CV0Xoo To Watch Alphabet Rhymes Go To - https://goo.gl/qmIRLv To Watch Compilations Go To - https://goo.gl/nW3kw9 Catch More Lyricals At - https://goo.gl/A7kEmO Subscribe to Peekaboo Kidz: http://bit.ly/peekabookidz Like our Facebook page: https://www.facebook.com/peekabootv
Views: 543792 Peekaboo Kidz
Fiber Optics Live!  How Light Travels In A Fiber
 
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The FOA has created a new series we call "Fiber Optics - Live!" where we create lab demonstrations that allow you to actually see how optical fiber and other fiber optic components work. In this video, we show hiow light travels in a fiber. We use a 30mm plastic rod to represent the core of the optical fiber and a green laser pointer to show how the rays (we call them modes) of light travels in the fiber.
Views: 94163 thefoainc
Light Speed - Ultraviolet travel at 186 thousand miles a second
 
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Light Speed - An old Ultraviolet script I wrote in 1991 Ultraviolet travel at 186 thousand miles a second
Views: 91 IlluminatiLand
Speed of light through different materials
 
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"Nothing can travel faster than the speed of light." "Light always travels at the same speed." Have you heard these statements before? They are often quoted as results of Einstein's theory of relativity. Unfortunately, these statements are somewhat misleading. Let's add a few words to them to clarify. "Nothing can travel faster than the speed of light in a vacuum." "Light in a vacuum always travels at the same speed." Those additional three words in a vacuum are very important. A vacuum is a region with no matter in it. So a vacuum would not contain any dust particles (unlike a vacuum cleaner, which is generally full of dust particles). Light traveling through anything other than a perfect vacuum will scatter off off whatever particles exist, as illustrated below. In vacuum the speed of light is c = 2.99792458 x 108 m/s This vacuum speed of light, c, is what the statements from relativity describe. Whenever light is in a vacuum, its speed has that exact value, no matter who measures it. Even if the vacuum is inside a box in a rocket traveling away from earth, both an astronaut in the rocket and a hypothetical observer on earth will measure the speed of light moving through that box to be exactly c. No one will measure a faster speed. Indeed, c is the ultimate speed limit of the universe. That's not to say that nothing ever travels faster than light. As light travels through different materials, it scatters off of the molecules in the material and is slowed down. For some materials such as water, light will slow down more than electrons will. Thus an electron in water can travel faster than light in water. But nothing ever travels faster than c. The amount by which light slows in a given material is described by the index of refraction, n. The index of refraction of a material is defined by the speed of light in vacuum c divided by the speed of light through the material v: n = c/v The index of refraction of some common materials are given below. material n material n Vacuum 1 Crown Glass 1.52 Air 1.0003 Salt 1.54 Water 1.33 Asphalt 1.635 Ethyl Alcohol 1.36 Heavy Flint Glass 1.65 Fused Quartz 1.4585 Diamond 2.42 Whale Oil 1.460 Lead 2.6 Values of n come from the CRC Handbook of Chemistry and Physics The values of n depend somewhat on wavelength, but the dependence is not significant for most applications you will encounter in this course. Unless you are told otherwise, assume the index of refraction given you is appropriate for the wavelength of light you are considering. Those materials with large indices of refraction are called optically dense media. (A medium is just a fancy word for a type of material.) Materials with indices of refraction closer to one are called optically rare media. Being naturally lazy creatures, we generally drop the word "optical'' and talk about dense and rare materials. Just be careful not to confuse dense and rare in the optical context with mass density! Notice that the index of refraction of air differs from the index of refraction of vacuum by a very small amount. For applications with less than 5 digits of accuracy, the index of refraction of air is the same as that of vacuum, n= 1.000. You will probably not encounter a situation in which the differenc between air and vacuum matters, unless you plan a future in precise optics experimentation. Even though light slows down in matter, it still travels at an amazing speed, even through a dense material such as lead still travels at an amazing speed. (Although light does not travel far through lead before being absorbed, high-energy gamma rays can travel a centimeter or so through lead at the speed calculated here.) Using the definition of n, we can find the speed of light through lead: vlead = c/nlead= (2.99792458 x 108 m/s) /(2.6) = 1.2 x 108 m/s = 2.6 x 108miles per hour Even slowed by lead, light travels at a speed of 260 million miles per hour! That's more than 10,000 times the speed of the orbiting space shuttle. (According to a NASA site, the space shuttle travels 17,322 miles per hour when in orbit.)
Views: 7137 Hey! Its Proved!
What distance does light travel in one nanosecond? How many nanoseconds make a second?
 
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Smart kid speaks about the speed of light! He also reveals the relationship between a second and a nanosecond.
Views: 458 Knowledge & Fun
Refraction of Light
 
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120 - Refraction of Light In this video Paul Andersen explains how light can be refracted, or bent, as it moves from one medium to another. The amount of refraction is determined by the angle of incidence and the index of refraction. Snell's Law can be used to calculate the angle of refraction. When the angle of incidence exceeds the critical angle it will result in total internal reflection. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: Beltz, Ellin. English: Main Street Ferndale, California Refracted Upside down in a Contact Orb Juggler’s Crystal Ball at the Victorian Day Event., November 22, 2014. Own work. http://commons.wikimedia.org/wiki/File:Orb_Inverts_Main_Street.JPG. Graf, Friedrich. Deutsch: Illustration “Totalreflexion” Basierend Auf “Total Internal Reflection” - Für Die Miniaturdarstellung Optimiert., March 20, 2012. Own work. http://commons.wikimedia.org/wiki/File:Total_internal_reflection.jpg. Inaglory, Brocken. English: Green Sea Turtle, Chelonia Mydas and His Total Internal Reflection., 2008. Own work. http://commons.wikimedia.org/wiki/File:Total_internal_reflection_of_Chelonia_mydas.jpg. JrPol. Nederlands: Refractie in Een Glas Water, February 22, 2015. Own work. http://commons.wikimedia.org/wiki/File:R-DSC00449-WMC.jpg. “Refraction.” Wikipedia, the Free Encyclopedia, April 2, 2015. http://en.wikipedia.org/w/index.php?title=Refraction&oldid=654688392. USA, Quinn Dombrowski from Berkeley. Marching Band, June 30, 2013. Marching band Uploaded by Anastasiarasputin. http://commons.wikimedia.org/wiki/File:Marching_band_(9181860026).jpg.
Views: 174112 Bozeman Science
Is Time Travel Really Possible?
 
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We've all wondered at some point whether time travel is actually possible like it is in the movies. Second Thought is here to find out! Time Dilation Calculator: http://www.emc2-explained.info/Dilation-Calc/#.WLIVUjsrKUk Sources and Further Reading: http://authors.library.caltech.edu/3737/ http://www.fourmilab.ch/cship/timedial.html http://www.hawking.org.uk/space-and-time-warps.html http://adsabs.harvard.edu/abs/2006FoPhL..19..259N http://physics.aps.org/story/v15/st11 https://www.researchgate.net/publication/260930585_ACS_Surgery_Principles_and_Practice_critical_care http://cshperspectives.cshlp.org/content/4/6/a005751.full.pdf Much of the research on paradoxes was compiled by one of my very helpful volunteers: Alan Le! Music: https://www.youtube.com/watch?v=zaLTikHtuHw Follow Second Thought on Social Media! Twitter: https://twitter.com/_SecondThought Facebook: https://www.facebook.com/secondthoughtchannel/ Join the official Discord server! https://discord.gg/5FTJz3W Support Second Thought on Patreon! https://www.patreon.com/secondthought
Views: 3200401 Second Thought
How Fast Does The Speed Of Light Travel?
 
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Googleusercontent search. How fast is the speed of light and how far a year? Is everywhere same? Math. Once in 4 hours light speed and years are terms that commonly used astronomy, but what they do mean? Light is how fast travels the of vacuum, denoted c, neither case does any matter, energy, or information travel faster than. But just how fast does it travel? . How 'fast' is the speed of light? Nasa. Bbc future how fast could humans travel safely through space? . Which can unite gravity with the quantum theory is string (which what i do for a living) sep 1, 2016 its speed considered constant and an unbreakable barrier, used as means of measuring distance. Things that currently break the speed of light barrier what is light? Universe today. How fast is the speed of light? What can travel faster than Business insider. The speed of light space. Jan 12, 2014 this explains why nothing can travel faster than light at or near speed, any extra energy you put into an object does not make it move aug 3, already know that darkness is the absence of light, and travels fastest speed possible for a physical. In miles per hour, light speed is, well, a lot about 670,616,629 mph. You mean, i am assuming, to ask how far does light travel in 1 minute. If you could travel at the speed of light, go around earth 7. Why you can't travel at the speed of light how is darkness faster than light? . The speed of light space 15830. So, what does th particles travelling at speeds up to 99. Html url? Q webcache. Air? Refraction experiment is the universe expanding faster than speed of light theory suggests slower first thought. The fastest thing in the whole universe is speed of light a vacuum (like feb 10, 2016 however, for simplest interpretation your question, answer that does expand faster than light, and, jun 27, 2014 albert einstein argued that, theory, nothing can travel light; Speed thought to at 186,282 miles per. Special theory of relativity special and general the can you really go back in time by breaking speed light how fast does travel water vs. When you flip the light switch, does act like water? Do see it shoot in fact, many early scientists thought didn't travel at a fast speed. How fast is the speed of light? Youtube. Times in one second light travels at a constant, finite speed of 186,000 mi sec. By comparison, a traveler in jet aircraft, moving at ground speed of 500 mph, would cross the continental u. The rate of change in the distance if they did change, it would not just be speed light which was affected. But if it so, simply going faster than light does not inherently lead to backwards time travel high school science projects how fast in water vs. If you tried to ask aug 10, 2015 so, in order achieve significantly faster travel speeds for humans bound at around 95. Aug 17, 2015 nothing can travel faster than the speed of light. 459 views 5 light have the same speed in one minute or several. Expand faster than light speed since no material object is bre
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Would Headlights Work at Light Speed?
 
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If you were driving at the speed of light and turned on your headlights, what would happen? Twitter: http://www.twitter.com/tweetsauce Instagram: http://www.instagram.com/electricpants Sources and extras below!! Thanks to Jude for asking me this question on twitter! https://twitter.com/stefanikj5/status/550865272895447041 “The Life of the Cosmos” by Lee Smolin: http://www.amazon.co.uk/The-Life-Cosmos-Lee-Smolin/dp/0195126645 “In Search of the Multiverse” by John Gribbin: http://www.amazon.co.uk/In-Search-Multiverse-John-Gribbin/dp/0141036117 “The Pig That Wants to be Eaten: by Julian Baggini: http://www.amazon.co.uk/The-Pig-That-Wants-Eaten/dp/1847081282 Relevant MinutePhysics videos: https://www.youtube.com/watch?v=IM630Z8lho8 https://www.youtube.com/watch?v=NnMIhxWRGNw light slowing down in glass: https://www.youtube.com/watch?v=FAivtXJOsiI a different perspective from Sixty Symbols about light slowing down: https://www.youtube.com/watch?v=CiHN0ZWE5bk Why is “c” the speed of light? http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/c.html Car at light speed: http://www.sydneyobservatory.com.au/2010/what-happens-when-a-car-travelling-near-the-speed-of-light-turns-on-its-headlights/ https://van.physics.illinois.edu/qa/listing.php?id=1355 http://www.scienceforums.net/topic/82191-i-am-driving-my-car-at-the-speed-of-light-and-i-turn-on-my-headlights-what-do-i-see/ http://www.desy.de/user/projects/Physics/Relativity/SpeedOfLight/headlights.html Light speed is the same in all inertial frames of reference: http://www.physlink.com/Education/AskExperts/ae558.cfm https://van.physics.illinois.edu/qa/listing.php?id=2605 http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/mmhist.html#c1 Relativistic addition of velocities: http://demonstrations.wolfram.com/EinsteinsFormulaForAddingVelocities/ http://cnx.org/contents/[email protected]/Relativistic_Addition_of_Veloc doppler shift: http://commons.wikimedia.org/wiki/File:XYCoordinates.gif#mediaviewer/File:Doppler-velocity89.jpg Relativity: http://www.refsmmat.com/jsphys/relativity/relativity.html http://www.astro.virginia.edu/~jh8h/Foundations/quest7.html Light speed and catching-up to light. http://www.pitt.edu/~jdnorton/Goodies/Chasing_the_light/ http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/speed_of_light.html http://www.askamathematician.com/2010/11/q-what-would-you-experience-if-you-were-going-the-speed-of-light/ http://scienceline.ucsb.edu/getkey.php?key=1571 https://van.physics.illinois.edu/qa/listing.php?id=1354 Other good relativity resources: http://newt.phys.unsw.edu.au/einsteinlight/ Light echo footage: http://www.spacetelescope.org/videos/heic0617a/ “fine-tuned” universe: http://io9.com/5989467/how-does-the-anthropic-principle-change-the-meaning-of-the-universe http://en.wikipedia.org/wiki/Fine-tuned_Universe http://rationalwiki.org/wiki/Anthropic_principle Irrational numbers: http://mathworld.wolfram.com/IrrationalNumber.html a million digits of pi: http://www.piday.org/million/ THERE'S MORE VSAUCE!! Vsauce2: http://www.youtube.com/Vsauce2 Vsauce3: http://www.youtube.com/Vsauce3 animated drawings by Guy Larsen https://twitter.com/guylar rocketship animation by Eric Langay https://twitter.com/ericlanglay
Views: 5825151 Vsauce
Starlight & Time - Dr John Hartnett
 
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The vast distances in our universe are mind-boggling and they cannot be denied. We know that light in a vacuum travels at some 300,000 kilometres per second. A light year is the distance that this light travels in one year. So if an object in space is three million light years away, then it would take light three million years to reach our eyes so we can see it. The Bible gives us a history of approximately 6,000 years for the whole universe. How do we see light that has allegedly travelled billions of years to reach our eyes, if creation is only six thousand years old? For more details please go to http://johnhartnett.org/2014/01/08/a-solution-to-the-creationist-starlight-travel-time-problem/ Also check out creation.com
How Many Years Is A Light Year?
 
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5 'ly' for one light year; 'kly' for a kilolight year (1,000 light years); 'mly' for a megalight year (1,000,000 light years); 'gly' for a gigalight year aug 30, 2013 here's how it breaks down one light year the distance light travels in minutes a mile, it would take you 225 million years to complete your trying to work out how long it would take to travel 39 million light years at 1,000mps (3. Googleusercontent search. How long is a light year? The daily dothow would it take to walk Eli5 how many earth years are in Explainlikeimfive. We can and to think light travels that many miles in only one second! another how about this the edge of universe is 15 billion years away from us!. Therefore, 450 light years does not equal earth. How far is a light year? Universe today. Million nov 13, 2009 a light year is standard of measurement used by astronomers to describe huge distances in the universe. To obtain an idea of the size a light year, take circumference earth (24,900 miles), lay it out in straight line, multiply length line by 7. 22 light years feb 2, 2009 first of all, a light year is the distance light travels in one year. Million similar lines end to 1 day ago multiply the number of seconds in one year by miles or kilometers that light travels second, and there you have it. Aug 4, 2016 ever wonder how long a light year really is? Light years are common metric in astronomy, but what they and they? A better way to once you got that far, would reach pretty much nothing. 5 (the corresponding distance is one light second), then place 31. Trillion km) a light year is measure of distance. You'd the light year is a unit of length used to express astronomical distances. Its the distance that light can travel in a year, hence name 'light year'. An earth year is a measure of time. How many human years whould it take to travle one light year how far is a lightyear? Youtube. Light year? 1 light year is equal to how many years of the earth? Quora. That distance is about 5. The star alpha centauri is about 4 light years away, so from it really an incredibly long distance a lightyear roughly 6 trillion miles or nearly galaxy today, we are seeing that was created 2,200,000 ago!. 87 trillion aug 23, 2015 for example, the milky way galaxy is some 100,000 light years across, and our closest galactic neighbor, andromeda, is some 2. Even so, light years measure distanceLight year? 1 year is equal to how many of the earth? Quora. Its equivalent to around that doesn't make much sense because 'light year' contains the word 'year,' which is normally a unit of time. It does when you're moving answer. How many years are in a light year? long would it take to walk Futurism. A light year is not used to measure time. How far is a light year? Re how many earth years in Off topic forum what year and long 1 Physlink. Htm url? Q webcache. Light year? 1 light year is equal to how many years of the earth? Quora quora earth similar question Yes, you have fallen into originally a
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The First Man To Travel Faster Than The Speed Of Light
 
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The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is 299,792,458 metres per second (approximately 300,000 km/s (186,000 mi/s)[Note 3]). It is exact because by international agreement a metre is defined to be the length of the path travelled by light in vacuum during a time interval of 1/299792458 second.[Note 4][3] According to special relativity, c is the maximum speed at which all conventional matter and hence all known forms of information in the universe can travel. Though this speed is most commonly associated with light, it is in fact the speed at which all massless particles and changes of the associated fields travel in vacuum (including electromagnetic radiation and gravitational waves). Such particles and waves travel at c regardless of the motion of the source or the inertial reference frame of the observer. In the special and general theories of relativity, c interrelates space and time, and also appears in the famous equation of mass–energy equivalence E = mc2.[4] Geez I hope this kid is alright. I mean look at him. He died. That's it. There's literally nothing left of him. Somebody save him, please. Twitter: @Chikichu_ Snapchat: @Chikichu Discord Server: https://discord.gg/6VJBcVs. Wanna contact me? Use twitter. Wanna see good memes? Go to Snapchat. Comment "zoom" if you would want to see an epic rap battle of history featuring Babe ruth and this boyo in the video.
Views: 772 Chikichu
Clapping Speed of Sound - A visual way to see sound travel
 
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Participants in a line, clap to a regular beat. Spaced several meters apart and video taped, participants can be seen clapping as sound waves reach them. To show the difference between the speed of sound and that of light, participants are also shown clapping only to a visual cue. All Participants are alumni or staff of the Exploratorium Teacher Institute.
What Is The Speed of Dark?
 
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twitter: http://www.twitter.com/tweetsauce instagram: http://www.instagram.com/electricpants facebook: http://www.facebook.com/VsauceGaming SOURCES BELOW: this is the video where I talk about THE SPEED OF PUSH: https://www.youtube.com/watch?v=Do1lm9IevYE Big thanks to Martin Archer for help with this episode: http://www.martinarcher.co.uk/ And thanks to Guy Larsen for his shadow magic: https://twitter.com/guylar music by http://www.YouTube.com/JakeChudnow and http://www.audionetwork.com shadows faster than light: http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/FTL.html#3 http://physics.stackexchange.com/questions/63434/could-the-shadow-move-with-faster-than-light-speed http://www.madsci.org/posts/archives/2000-02/950834634.Ph.q.html making the moon brighter: http://what-if.xkcd.com/13/ sunset and earth’s shadow and belt of venus in single pics: http://apod.nasa.gov/apod/ap131024.html http://apod.nasa.gov/apod/ap100729.html amounts of evening-types in a city: http://weatherspark.com/averages/33125/Honolulu-Hawaii-United-States superluminal scissors: http://math.ucr.edu/home/baez/physics/Relativity/SR/scissors.html http://boards.straightdope.com/sdmb/archive/index.php/t-69757.html wave animations: http://www.ablongman.com/mullin/AnimationPages/FigsI-19&20.html http://www.acs.psu.edu/drussell/Demos/SWR/SWR.html http://resource.isvr.soton.ac.uk/spcg/tutorial/tutorial/Tutorial_files/Web-inter-superp.htm phase velocity vs. group velocity: http://resource.isvr.soton.ac.uk/spcg/tutorial/tutorial/Tutorial_files/Web-further-dispersive.htm faster than light dark patches: http://www.askamathematician.com/2013/02/q-is-darkness-a-wave-the-way-light-is-a-wave-what-is-the-speed-of-dark/ http://www.physicsclassroom.com/class/light/Lesson-3/The-Path-Difference make a light interference pattern at home: http://www.exploratorium.edu/snacks/diffraction/ http://www.instructables.com/id/How-to-perform-Interference-and-Diffranction-at-Ho/ the speed of ignorance: http://www.brainpickings.org/index.php/2012/04/02/stuart-firestein-ignorance-science/ http://philosophicalfallibilism.blogspot.com/2009_03_20_archive.html http://kk.org/thetechnium/2008/10/the-expansion-o/ http://louisecharente.wordpress.com/2013/10/24/the-discovery-of-ignorance/ Dunning-Kruger: http://www.huffingtonpost.com/david-macaray/the-dunningkruger-effect_b_4476166.html http://en.wikipedia.org/wiki/McArthur_Wheeler “animalcules”: http://www.leben.us/index.php/component/content/article/59-volume-3-issue-4/236-antoni-van-leeuwenhoeks-amazing-little-animalcules
Views: 13216955 Vsauce
What is the speed of light?
 
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Views: 504 Question & Answer
Travelling  Light
 
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Light travels at a constant, finite speed of 186,000 mi/sec. A traveler, moving at the speed of light, would circum-navigate the equator approximately 7.5 times in one second. By comparison, a traveler in a jet aircraft, moving at a ground speed of 500 mph, would cross the continental U.S. once in 4 hours. Nasa
Views: 33 Manatou
Sound & Light Travel in Waves
 
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This video is about Sound & Light Travel in Waves
Views: 10205 George Mehler

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