Please also explain why or why not?
2006-12-02 06:47:56 · 4 answers · asked by Slightlynorth 2 in Science & Mathematics ➔ Physics
Only in an absolute, complete vacuum does light travel at 299,792,458 meters/second. Everywhere else it moves fractionally slower. However, whatever velocity it has light will be totally unaffected by the speed of its source. For instance, if the headlights on a car are moving along at 80 mph, the speed of the light coming from them won't have 80 mph added to its velocity. If a spaceship is moving at 10,000 mph and shines a light ahead, the light won't travel at 299,792,458 meters/second plus 10,000 mph but remain fixed at 299,792,458 meters/second.
2006-12-02 06:55:29 · answer #1 · answered by Chug-a-Lug 7 · 0⤊ 1⤋
the speed of light doesn't changh because of the source's strength or if the sours is moving.but,light goes faster in a vacuum than in air because the air gets in the way.it would go even slower in water
[air is not100percent consistent so the answer is no]
2006-12-02 16:17:37 · answer #2 · answered by the professor 2 · 0⤊ 0⤋
Light travels at 186,000 miles per second in a vaccuum. It will travel slower through air and even slower through water. If it travels through some exotic heavy molecular liquid medium, it can be outrun by cosmic ray particles.
2006-12-02 14:51:14 · answer #3 · answered by Anonymous · 1⤊ 1⤋
No; the speed of light varies depending on what material it is traveling through.
2006-12-02 14:51:16 · answer #4 · answered by The Old Professor 5 · 0⤊ 1⤋