New answers tagged doppler-effect
5
You can use a reflector with gaps. Then the light from a car will alternate between reflecting and not reflecting at a rate dependent on their velocity towards the reflector. Please excuse my crude diagram:
As the car moves right to left, gaps in the reflector will cause it to appear to flash on an off.
0
Due to the speed of light, the "dopler shift" would be too small, at the usual speed of the observers.
Top 50 recent answers are included
