A Doppler red shift indicates
A) a shift toward higher frequencies.
B) a shift toward shorter wavelengths.
C) that a light source is approaching relative to the observer.
D) none of these.

Question

Quizplus · Accepted Answer

A Doppler red shift indicates that a light source is moving away from the observer, leading to a shift toward lower frequencies and longer wavelengths, not higher frequencies or shorter wavelengths.

A Doppler Red Shift Indicates