2006-06-17 14:13:22 · 14 answers · asked by aznpimpkin1 1 in Social Science ➔ Anthropology
The speed of light in a vacuum, c, is exactly (by definition),
299,792,458 m/s.
2006-06-17 14:17:08 · answer #1 · answered by mrjeffy321 7 · 1⤊ 0⤋
The speed of light in a vacuum is denoted by the letter c for constant or the Latin celeritas (speed). The speed of light through a transparent medium (that is, not in vacuum) is less than c; the ratio of c to this speed is called the refractive index of the medium.
In metric units, c is exactly 299,792,458 metres per second or 1,079,252,848.8 kilometres per hour. Converted to imperial units, it is approximately 186,282.397 miles per second, or 670,616,629.384 miles per hour. Note that this speed is a definition, not a measurement, since the fundamental SI unit of length, the metre, has been defined since 21 October 1983 in terms of the speed of light—one metre is the distance light travels in a vacuum in 1/299,792,458 of a second.
2006-06-17 21:17:44 · answer #2 · answered by Spock 6 · 0⤊ 0⤋
The speed of light is 186,000 miles per second or 299,792,458 meters per second or the time it takes for the light to turn green before the guy behind you starts honking.
2006-06-17 21:20:16 · answer #3 · answered by 4mom 4 · 0⤊ 0⤋
So slow it takes 10 Billion Light Years to reach galaxy cluster XMMXCS 2215-1734. One light year is how far light can travel in one year at a rate of about 186,000 miles per second. Ow! That is a long way to travel. Light shoud travel faster so we could see further into the universe. Who wrote the specs for light anyhow? I listen to Don Albert. He seems to know these things.See link.
2006-06-18 21:27:01 · answer #4 · answered by Me3TV 2 · 0⤊ 0⤋
SPEED LIMIT:
186,000
Miles per Second
It's the Law!!
But don't worry about ever getting a speeding ticket, since you can never go faster than the limit.
2006-06-18 07:17:29 · answer #5 · answered by quntmphys238 6 · 0⤊ 0⤋
Are you serious? You can't go to wikipedia or yahoo and type in speed of light? Come on people...
2006-06-17 22:16:36 · answer #6 · answered by Anonymous · 0⤊ 0⤋
In metric units, c is exactly 299,792,458 metres per second or 1,079,252,848.8 kilometres per hour. Converted to imperial units, it is approximately 186,282.397 miles per second, or 670,616,629.384 miles per hour
2006-06-17 21:16:26 · answer #7 · answered by ? 4 · 0⤊ 0⤋
299 792 458 m / s
fast as all get out
2006-06-17 21:16:37 · answer #8 · answered by staterules9 3 · 0⤊ 0⤋
In metric units, 299,792,458 metres per second or 1,079,252,848.8 kilometres per hour. Converted to imperial units, it is approximately 186,282.397 miles per second, or 670,616,629.384 miles per hour.
2006-06-17 21:17:45 · answer #9 · answered by Mike B 3 · 0⤊ 0⤋
299,792,458 metres per second or 1,079,252,848.8 kilometres per hour
2006-06-18 06:04:19 · answer #10 · answered by Rim 6 · 0⤊ 0⤋