The spectral lines of a star will appear ____________________ if the star is moving away from the Earth.
A) red shifted (i.e., shifted toward the longer wavelengths)
B) blue shifted (i.e., shifted toward the shorter wavelengths)
C) the same (no shift)

Question

Quizplus · Accepted Answer

When a star is moving away from the Earth, its spectral lines are red shifted due to the Doppler effect, meaning they shift toward longer wavelengths.

The Spectral Lines of a Star Will Appear ____________________ If