When a distant source emits light of a particular wavelength in the visible, and the source is moving away from us, the color of the light appears to us to be shifted toward the
A) red end of the visible spectrum.
B) blue end of the visible spectrum.

Question

Quizplus · Accepted Answer

This phenomenon is known as the redshift, which occurs due to the Doppler effect. As the source moves away, the wavelength of the light stretches, making it appear redder than it originally was.

When a Distant Source Emits Light of a Particular Wavelength