Question

the visible light emitted shortly after the big bang would be greatly redshifted by now and would be what kind of electromagnetic radiation?

radiowaves

gamma rays

microwaves

x - rays

rewatch

Explanation:

The cosmic microwave background (CMB) is the afterglow of the Big Bang. The visible light from the early universe has been highly redshifted over time, stretching its wavelength to the microwave range. Radiowaves have longer wavelengths than microwaves, gamma rays and x - rays have shorter wavelengths (higher energy) than visible light, so they don't fit the redshifted visible light from the Big Bang.

Answer:

microwaves (the option with "microwaves")