When a blinking light source moves relative to you, the speed of the light
A)changes but the frequency of blinks remains constant.
B)remains constant but the frequency of blinks can change.
C)stays the same, as does the blinking frequency.

Question

Quizplus · Accepted Answer

The speed of light in a vacuum is constant regardless of the motion of the source or the observer, according to Einstein's theory of relativity. However, the frequency of the blinks (or the frequency of the light waves) can change due to the Doppler effect, where the movement of the source relative to the observer causes the observed frequency to increase (blue shift) if the source is moving towards the observer, or decrease (red shift) if the source is moving away.

When a Blinking Light Source Moves Relative to You, the Speed