http://www.outdoorlanternsonsale.com/flashlight-headlight/
flashlight on a car...can it break "the speed of light"?
Classic problem...
If a flashlight (or headlights I guess) is turned on, on a car going 60mph, why isn't the speed of that light 60+(speed of light)?
Because by much experimental evidence it has been shown that the speed of light is a constant in any non-accelerated reference frame.
So the observer that watches the light coming at him from your car's flashlight (or headlights for that matter), will not see a beam of light that's moving 60mph + c, but rather a beam moving at c, but blue-shifted a bit. If the car is moving away from him, it will be red-shifted a bit. However, the shift will be so small that a human wouldn't notice it.
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