2007-03-05 15:58:03 · 10 answers · asked by jackc396 2 in Science & Mathematics ➔ Physics
The speed of light in a true vacuum is almost 300,000km per second, which is 187,500 miles per second.
In the best vacuum we can produce, it is about 0.8% less. On Earth it is around 1.1% less. Light is subject to gravity in its own quantumised way.
The theory of relatively states that light moves at a quasi-infinite speed, but in reality is limited to the universe's highest attainable speed.
2007-03-05 16:51:46 · answer #1 · answered by Peter F 5 · 0⤊ 0⤋
299,792.458 km/s is the speed of light in vacuum. However, according to Einstein's theory of General Relativity, the speed of light appears to vary with the intensity of the gravitational field.
2007-03-06 00:06:39 · answer #2 · answered by ButterMilkQueso 2 · 0⤊ 0⤋
.the speed of light is around 182 thousand miles per second but the speed of thought is even faster
2007-03-06 00:11:25 · answer #3 · answered by mikehughes06@yahoo.ca 3 · 0⤊ 0⤋
It is the speed that light travels...the sunlight you see is actually spending several minutes traveling through space to get to you.
The speed or velocity of light is approximately 186,000 miles per second or 300,000 kilometers per second in a vacuum. - from source below...
2007-03-06 00:03:48 · answer #4 · answered by Jennifer B 3 · 1⤊ 0⤋
The speed of light is approximately 186,000 miles per second or 299338 kilometers per second.
http://www.worldwidemetric.com/metcal.htm
2007-03-06 00:33:12 · answer #5 · answered by Anonymous · 0⤊ 0⤋
3 * 10^8 m/s in vaccum.
It may vary in different media, according to the refractive index of the material according to the formula:- RI=the speed of lightin vaccum/the speed of light in the medium.
2007-03-06 00:18:00 · answer #6 · answered by Anonymous · 0⤊ 0⤋
very,very,very FAST. Don't know the speed right off hand ,but you can believe that it is really fast.
2007-03-06 00:08:02 · answer #7 · answered by heavenlli_61 5 · 0⤊ 1⤋
2.997924562E+05 km/sec
Or
1.862823959E+05 miles/sec
2007-03-06 00:01:46 · answer #8 · answered by Walking Man 6 · 1⤊ 0⤋
299,792,458 metres per second or 1,079,252,848.8 km/h
2007-03-06 00:10:50 · answer #9 · answered by yan 2 · 0⤊ 0⤋
dunno go ask your uncle
2007-03-06 00:06:23 · answer #10 · answered by Anonymous · 0⤊ 1⤋