How does the expansion of the universe affect light?
1 Answer
Aug 26, 2015
Shifts it toward the color red.
Explanation:
As objects move further away the light waves that are emitted by it are stretched out,, so the wavelength becomes longer. The longer wave lengths in the visible spectrum of light are red. So as the waves are stretched they shift toward the red end of the spectrum.
This is also known as the Doppler effect.
