A Doppler red shift indicates
A) a shift toward lower 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 a shift toward lower frequencies, which happens when the source of light is moving away from the observer, leading to an increase in the wavelength of the light observed.

A Doppler Red Shift Indicates