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2006-07-07 15:22:22 · 12 answers · asked by John H 1 in Science & Mathematics ➔ Physics
In metric units, c is exactly 299,792,458 metres per second or 1,079,252,848.8 kilometres per hour.
2006-07-07 15:24:22 · answer #1 · answered by MarQus1 4 · 0⤊ 0⤋
The speed of light is defined as "C". "C" denotes a constant unchanging velocity. By its very definition of "C", light has no speed per se, as speed is a measure of change over a period of time. A constant does not change, therefore there can be no speed associated with light.
2006-07-07 22:59:58 · answer #2 · answered by MtnAv8r 2 · 0⤊ 0⤋
Speed of light is the overall limitation on % of total equivalent energy that a massive object can allocate to a velocity in the spatial volume, OR its relative passage through the time dimention.
2006-07-07 22:30:40 · answer #3 · answered by brian h 1 · 0⤊ 0⤋
Light travels through the vacuum of space at 299,793 km per second (which is 1,079,252,960 km per hour); or 186,282 miles per second (which is 670,619,880 miles per hour). The speed of light is not constant; it travels about 3 percent more slowly through air and much more slowly through glass or water.
2006-07-08 05:23:15 · answer #4 · answered by Axiom 3 · 0⤊ 0⤋
299 792 458 m / s
2006-07-07 22:25:58 · answer #5 · answered by lester2590 2 · 0⤊ 0⤋
I think.. c= 3 x 10^8
2006-07-07 22:25:01 · answer #6 · answered by Jen 1 · 0⤊ 0⤋
it is different for different materials but in vaccum it is constant 3*10^8
2006-07-07 22:36:54 · answer #7 · answered by ghulamalimurtaza 3 · 0⤊ 0⤋
300'000 kilometers per second
2006-07-07 22:27:59 · answer #8 · answered by Azul 6 · 0⤊ 0⤋
186,000 miles per second
2006-07-07 22:26:38 · answer #9 · answered by fattykitty2001 1 · 0⤊ 0⤋
186,282.397 miles per second
2006-07-07 22:24:59 · answer #10 · answered by cranura 4 · 0⤊ 0⤋