The redshift due to the Doppler effect is caused by
A)sources of light moving toward the Solar System.
B)sources of light moving away from the Solar System.
C)sources of light obscured by interstellar dust.
D)sources of light moving at right angles to the Solar System.
E)an effect not yet believed to be understood.

Question

Quizplus · Accepted Answer

The redshift due to the Doppler effect occurs when sources of light are moving away from the observer, causing the light's wavelength to stretch and shift towards the red end of the spectrum.

The Redshift Due to the Doppler Effect Is Caused by