What does cosmological redshift do to light?
A)makes it brighter
B)stretches its wavelength
C)makes it slow down
D)makes all light infrared

Question

Quizplus · Accepted Answer

Cosmological redshift stretches the wavelengths of light, causing them to shift towards the red end of the spectrum. This is due to the expansion of the universe, which causes the space between galaxies to stretch, and the wavelength of light to stretch along with it.

What Does Cosmological Redshift Do to Light