A Doppler red shift indicates
A) a shift toward higher frequencies.
B) a shift toward shorter wavelengths.
C) that a light source is receding 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, causing the observed wavelengths to stretch out and shift toward the red end of the spectrum. This does not mean a shift toward higher frequencies or shorter wavelengths, which would be a blue shift.

A Doppler Red Shift Indicates