A question anyone can answer.

[D. KIM]

In article <Pine.SUN.3.93.961017012449.2435B-100000 at nike> Jeremy Harrison <jharriso at nike.heidelberg.edu> writes:
>
>I have long been wondering;  If you are driving in n automobile that is
>traveling at the speed of light, what happens if you turn on the
>headlights?
>
>Please tell me what you think would happen.  If I don't get an answer,
>then I'll assume that none of you really know.
>
>Jeremy Harrison
>jharriso at nike.heidelberg.edu
>

This post has the sound of a college course question, and I would 
recommend you figure it out for yourself.

hint:  bear in mind that the speed of light is constant in a given 
medium, regardless of the movement of the source, and that headlights 
illuminate the surroundings via reflected light.

So here is another one:  Given that light is not propagated through a 
medium ("ether"), why is it not exempt from the Doppler effect?

Daniel Kim
dkim at nmsu.edu