2007-06-05 16:46:06 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Physics
299,792,458 meters per second
2007-06-05 16:49:51 · answer #1 · answered by Anonymous · 2⤊ 0⤋
While the velocity of light "c" is hereby measured as:
2.997 924 58 x 10^(8) m/s
we must consider three features of this condition:
First is that light-speed is the greatest measured velocity of any known feature of our known universe. Thus it is assumed to be a plateau beyond which there is no greater velocity.
Second, with all human endeavor, not even the tiniest partical of an atom has been compelled by human to achieve close to this velocity, let alone an actual atom, molecule or mixture of molecules.
The full energy of our own massive sun cannot compel molecules at light-speed. (humans have not that resource)
Third, the equation of any velocity is distance/time. If it were possible to "fold space", then velocity becomes secondary in measure.
However, it is believed in Einsteinian theory that as matter approaches the velocity of light, that TIME is altered. If this is correct, then ANY measure of velocity, becomes purely an inverse of time measured FROM light velocity as being ABSOLUTE ZERO.
Thus "c", the velocity of light is ZERO, and ALL TIME IS DERIVED FROM ANYTHING MOVING SLOWER.
The question is not how fast does light move, but relatively, how much slower do we percieve light movement.
If we, ourselves were moving much faster, the speed of light would not change, but time would.
But then, how would we know?
2007-06-06 01:56:08 · answer #2 · answered by warmspirited 3 · 0⤊ 1⤋
The speed of light (c) equals 2.997 924 58 x 10^(8) m/s.
This is calculated with the formula 1/sqrt(u*e), where
u = 4pi x 10^(-7) T*m/A (permeability of free space)
and
e = 8.854 187 817 x 10^(-12) C^(2)/N*m^(2) (permittivity of free space)
2007-06-06 00:17:51 · answer #3 · answered by Typical T 2 · 0⤊ 0⤋
Exactly 299,792,458 meters per second. That's because in 1983, the meter was defined in terms of the second and the speed of light.
2007-06-06 02:46:50 · answer #4 · answered by Frank N 7 · 0⤊ 0⤋
The speed of light is exactly 299,792,458 meters per second in a vacuum. Note that it is one of the fundamental constants in the universe.
2007-06-05 23:49:35 · answer #5 · answered by houk 1 · 0⤊ 0⤋
2.997 x 10^8 m/s. It's defined, not measured. So it's always going to be that fast.
2007-06-05 23:50:11 · answer #6 · answered by eri 7 · 1⤊ 0⤋
Bloody fast
2007-06-05 23:53:48 · answer #7 · answered by Anonymous · 0⤊ 1⤋
2.98 e 8
2007-06-05 23:49:52 · answer #8 · answered by mitu 2 · 0⤊ 1⤋
woah! light travels fast
i think it was 1,000,000 mph
2007-06-05 23:50:27 · answer #9 · answered by Flametrooper 2 · 0⤊ 2⤋
299,792,458 m/sec. or 1,079,252,848.8 km/h
2007-06-06 00:26:43 · answer #10 · answered by know it all 3 · 0⤊ 0⤋