The Doppler effect means that the motion of an object affects the light emitted from it. What result does the Doppler effect cause?

Question

Quizplus · Accepted Answer

The Doppler effect causes the wavelength of light (or other electromagnetic radiation) emitted from an object to shift depending on the relative motion of the object and the observer. If the object is moving towards the observer, the wavelengths shorten (blue shift); if it's moving away, they lengthen (red shift). This does not affect the speed of light, which remains constant, nor does it inherently change the perceived temperature of the object.

The Doppler Effect Means That the Motion of an Object