2007-02-23 01:11:02 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Physics
3x 10^8 m/s is just an approximation. maths freak is absolutely correct. 299792458m/s is the speed of light in vaccum.
2007-02-23 01:49:38 · answer #1 · answered by Anonymous · 0⤊ 0⤋
You can 299792458 m/s shorten as 300 Mm/s
with M = mega = a million
Th
2007-02-23 11:05:35 · answer #2 · answered by Thermo 6 · 0⤊ 0⤋
Maths freak is right, it is exactly 299 792 458 metres per second.
2007-02-23 09:18:45 · answer #3 · answered by Anthony Stark 5 · 0⤊ 0⤋
3 x 10**8 m/sec
(This is in space, light slows when going through matter such as water, which is why a stick in a pool looks bent—refraction.)
2007-02-23 09:19:57 · answer #4 · answered by Vedagyan 1 · 1⤊ 0⤋
Almost as fast as my 1987 Ford Escort with the flames spray painted on the sides.
2007-02-23 09:20:26 · answer #5 · answered by Anonymous · 0⤊ 2⤋
it actually depends on the medium, it's 1/sqrt(permeabiliy*permitibility) in vacuum
permeability (Uo) = 4pi * 10^-7;
permitibility (eo) = 8.8541878176 Ã 10^-12
that gives us c= 299,792,458 metres per second
in other mediums it will be c/sqrt (er*ur) (er= relative permitibility, ur = relative permeability)
2007-02-23 09:59:17 · answer #6 · answered by martianunlimited 2 · 0⤊ 0⤋
186,282.397 US statute miles per second in a vacum or about 1 U.S. foot per nanosecond.
2007-02-23 09:33:54 · answer #7 · answered by Anonymous · 0⤊ 0⤋
from michelson-morley experiment(1901) it is
c=299 989 km/sec
.
2007-02-23 09:15:21 · answer #8 · answered by Tuncay U 6 · 0⤊ 1⤋
299792458 m/s
2007-02-23 09:13:44 · answer #9 · answered by math freak 3 · 2⤊ 0⤋