2007-01-31 23:40:52 · 22 answers · asked by Addicted To Abercrombie & Fitch 2 in Science & Mathematics ➔ Physics
300,000 metres per second or
186,000 miles per second.
2007-02-01 00:18:21 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific context, electromagnetic radiation of any wavelength[1].
Speed:
The speed of light in a vacuum is exactly 299,792,458 meters per second (fixed by definition). Although some people speak of the "velocity of light", the word velocity is usually reserved for vector quantities, which have a direction.
2007-02-01 09:01:37 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Light travels at 299,792,458 meters per second and is denoted in physics equations by a "c". (That's 186,000 miles per second for you non-metric people!) At that speed, you could travel around the earth more than 7 times
2007-02-01 07:50:53 · answer #3 · answered by sirois.stacie@verizon.net 2 · 0⤊ 0⤋
In a vacuum about 186,000+ miles per second. The term "light year" refers to the distance light travels in a year (about six trillion miles). It is often misused to refer to time.
2007-02-01 07:47:19 · answer #4 · answered by david37863 2 · 0⤊ 0⤋
the speed of light = 299 792 458 m / s
2007-02-01 07:50:27 · answer #5 · answered by Anonymous · 0⤊ 0⤋
the speed of light = 299 792 458 m / s
2007-02-01 07:44:04 · answer #6 · answered by Batigol 2 · 0⤊ 0⤋
According to the currently prevailing definition, adopted in 1983, the speed of light is exactly 299,792,458 metres per second (approximately 3 Ã 108 metres per second, or about thirty centimetres (one foot) per nanosecond).
2007-02-01 07:47:10 · answer #7 · answered by The Know-It-All 2 · 0⤊ 0⤋
The speed of light is 299,762,458m per 9,192,631,770 of a particular radiation from cesium -133 atom in vaccum.
We can also calculate the speed of light in any medium using the equation v=1/ ( ( permittivity of the medium * permeability of the medium) ^ 0.5).
2007-02-01 09:34:30 · answer #8 · answered by sankar s 2 · 0⤊ 0⤋
the speed of light is approx. 3 x 10 raised to the power 8 metre/sec in air or in vacuum.
2007-02-01 11:23:10 · answer #9 · answered by lucky 1 · 0⤊ 0⤋
Its 3*10 to the power 8 metres/second......(approx)
2007-02-01 09:00:04 · answer #10 · answered by WoLviiiiiiiii 1 · 0⤊ 0⤋
You should know it.
299798+/-4 Km per second or 186000 miles per sec
2007-02-01 09:24:58 · answer #11 · answered by shibashis 5 · 0⤊ 0⤋