FunTrivia Homepage New Questions Unanswered Post a Question Goto Qn # Archives

Light slows down when it passes through certain substances, eg. glass, so therefore it is theoretically possible to slow light down further. What is the slowest speed that scientests have gotten light to?

Question #65991. Asked by OrliBloomizHOT. (May 21 06 4:10 AM)

pbr-streetgang

I can't find the exact slowest speed achieved, but light moves very slow in a vacuum.

 May 21 06, 2:30 PM
Baloo55th

Err, light moves fastest in a vacuum. It slows down in other things.
"Light travels at the “speed of light” - 300 million meters (186,000 miles) per second - only in a vacuum. Whenever light travels through a substance, its speed is slowed. For example, in water, light travels at only 225 million meters (140,000 miles) per second."
http://www.physicscentral.com/people/people-02-2.html
which is about Lene Hau, who, it appears, has slowed light down to 37 mph, and has also managed to stop light for a millisecond. This was inside a Bose-Einstein condensate, so you won't be able do do it at home.

 May 21 06, 2:47 PM
pbr-streetgang

Sorry, I guess I was confused about light in a vacuum.

Does it make a difference if you change the bag?

 May 21 06, 4:01 PM
Baloo55th

LOL!!!! Light won't even penetrate the bag in mine....

 May 22 06, 4:22 PM

 What is light, what is it made of, how do we know, and could you trap light (theoretically) forever in a mirror ball, and would it ever slow down or change its speed, and how do we guess that?

Suggested Related FunTrivia Quizzes - 90,000 currently online

1 Light
 This quiz is a series of questions on reflection, refraction, lenses and spectrum... basically, on different areas of light.
Electromagnetic Spectrum and Optics Very Difficult
10 Q
Rossell
Feb 02 07
2505 plays
2 And Then There Was Light
 Visible light is a very small band within the electromagnetic spectrum. Physicists consider the entire spectrum to be light. How much do you know about light?
Electromagnetic Spectrum and Optics Average
10 Q
drbabe
Nov 20 10
453 plays
3 Not Possible
 How likely do you think each of these events is - not possible, possible (but not likely to occur), probable (more likely than not to occur) or certain?
Thematic 10Q Tough Tough
10 Q
looney_tunes
Dec 01 10
714 plays

"Ask FunTrivia" is for entertainment purposes only, and answers offered are unverified and unchecked by FunTrivia. We cannot guarantee the accuracy or veracity of ANY statement posted. Feel free to post an updated response if you feel that an answer is inadequate or incorrect. Please thoroughly research items where accuracy is important to you using multiple reliable sources. By accessing our website, you agree to be bound by our terms of service.