On 3 Nov 2003, at 10:52, Martim Weinstein wrote: > If you're in a vehicle going the speed of light, what happens when you > turn on the headlights? from the position of the vehicle, the lights turn on from an observer in front (well in front and to the side;-) the lights would appear blue/purple/white from an observer behind (if the lights were rear lights) they would appear to not be on (or black? not the same thing actually) and i would have to assume that the speed of the light from the lights on the moving vehicle would be twice the speed of light so how did i do? peter