2006-08-11 13:42:31 · 10 answers · asked by skinny 1 in Science & Mathematics ➔ Mathematics
300,000km per second
2006-08-11 13:47:02 · answer #1 · answered by The Apostle 2 · 1⤊ 1⤋
The speed of light in a vacuum is exactly 299,792,458 metres per second (the SI metre is defined in terms of the speed of light in a vacuum), or roughly 186,282 miles per second, or 1 light year per year.
The speed of light changes depending on which medium it is in - this is what causes refraction.
2006-08-11 23:16:49 · answer #2 · answered by Anonymous · 1⤊ 0⤋
186,284/mps (but with the new varable c that has been discovered and been in threoy for some time now it's debatable what it's avg. over time is.)
true c= the avg of the speed of light over time
2006-08-11 23:05:07 · answer #3 · answered by Anonymous · 0⤊ 1⤋
It is the permittivity constant times the permeability constant to the -0.5. Both constants from electrostatics and magnetostatics, respectively.
2006-08-11 21:55:43 · answer #4 · answered by Fabrizzio 2 · 0⤊ 1⤋
186,000 miles per second, give or take a few
2006-08-11 20:52:26 · answer #5 · answered by Anonymous · 0⤊ 1⤋
approximately 186000 miles per second?
2006-08-11 20:48:14 · answer #6 · answered by chuckufarley2a 6 · 0⤊ 1⤋
c
2006-08-11 22:35:06 · answer #7 · answered by adepame 1 · 0⤊ 1⤋
186,000miles per second
2006-08-13 04:35:25 · answer #8 · answered by gorillaguth 3 · 0⤊ 1⤋
mm is right
2006-08-11 22:44:15 · answer #9 · answered by movie star 2 · 0⤊ 1⤋
186,284 miles/second.
2006-08-11 20:48:14 · answer #10 · answered by keepsondancing 5 · 1⤊ 1⤋