Enother interesting information: specially for you.
Discussion
- What do you think about this? see, .
- Since this video, light has been slowed significantly slower than 300 meters per second.
- It's also used in protective glasses for working with glass. Most glass gives off bright yellow flames from sodium in the mixture, but with glass containing Praseodymium, the yellow flame becomes a transparent, pink color. People in glass factories, glass blowers, etc. all use this glass.
- @Bjo15 you cannot hear anything in a vacuum and you cannot get sound as there are no particles in a vacuum
- so if you had a few hundred meters of that stuff and you shine a light in it, you could see light moving if you look at it from the side
- @liam7morris 340.29 is the speed if sound
- oh and this video is a tad old, compared to the ever changing science world. The speed I believe was 1/2 a mile an hour. The light is slowed down by passing it through a cloud a super cooled NA. Then speed back up by hitting it with a laser. They are talking about ways to make microchips and such obsolete in computers ways of processing information, and using a series of pulses to the computing. Idk much though.
- 0:04 A myriad of uses? Lol, Numberphile viewers will get a kick out of that.
- kool
- Sick!
- You are correct. I was wrong. I spoke too soon and didn't check my answer. D'OH!
- @liam7morris oh of course i mean speed of sound ^^ thanks for correcting me !
- Thank You so much!! I have this element for a project and now i have everything i need
- 5 stars? My, how times have changed.
- @1993gandy less actually
- 0:36 editor had a minor stroke.
- Indexes of refraction are found by comparing the speed of light in the medium in question and a vacuum. That is, n = c/v. If either c changes (which it isn't going to) or v, then n will. ...
- I think the element makes the light particles orbit around its atoms, which doesn't slow the speed, but making only the path longer.
- 300? Duuuuuuuuuuuuuuuuuuudddddddddddeeeee
- @etraise2 Well it can be interesting if you want to analyse some data what came from a collision with a specific particle. This might effect the light and if you slow th elight down its easyer to analyse i suppose?
- Thanks for explaining this man. I didn't realise it really lowered the speed of light. I just thought it changed the direction or something.
- Maybe he slipped in an S. If he did, then it's perfectly fine.
- 5 stars! Theese were good days! Now we we put thumbs up our a**!
- 300 m/s?????? that's pretty ridiculous considering it once was about 300,000,000 m/s!!! I never knew it could be slowed that much (slower than sound for pete's sake!) I can imagine, "you hear the thunder THEN you see the lightning" xD. anywayz 5 stars
- yeah by super cold sodium atoms and also a mixture of rubidium/helium gas. the sodium stopped all the light, but the rubidium/helium only got half (but the rubidium/helium experiment didn't need a vacuum and atoms that are withing one billionth of 0K).
- IF YOUTUBE WILL ALLOW ME TO COMMENT... :( Thanks for admitting your mistake. I try not to just call people idiots or whatever, since that rarely accomplishes anything. Anyway, if you check out Snell's law (I really don't want to type this out for the third time and not have it get posted successfully), then you will notice that the only thing that matters is the ratio of the velocities on both sides of the medium.
- @nintendowns It still travels with the same speed in different media, but not is a straight line.
- @derickhaywood well to me 30 mph hour sounds retarted, it was in a tube not a freaking street.
- holy crap 300m/s? isn't that slower than sound?
- @kylebossify Exactly
- this was a weird episode, but this channel is one of my favorites and praseodymium needs a longer vid so I can understand them throwing some stuff together to fill gaps in the table
- Of course lenses do only function because of the fact that light slows down in an optical denser medium (c1/c2=n1/n2).
- Changing the speed of light? Lol i never knew that was possible
- light has already been completely stopped
- And that was five years ago. I don't know if your account is still in active use but I'll tell you anyway that recently they actually stopped light altogether for a full minute, after which they let the beam go.