Because the galaxies are moving away from us,the light they emit
A)is shifted toward the shorter,blue wavelengths.
B)is shifted toward the longer,red wavelengths.
C)is of the same wavelength it would be if they were at rest relative to Earth.
D)arrives with increased intensity.
E)None of these is correct.

Question

Quizplus · Accepted Answer

This is known as redshift, which is caused by the Doppler effect. As an object moves away from an observer, the light waves are stretched out (wavelength is increased), causing the light to appear more reddish in color.

Because the Galaxies Are Moving Away from Us,the Light They