Which of the following is true of the cosmic background radiation?
A)It is brighter in the northern hemisphere than in the southern
B)It was produced by stars
C)It was produced a few 100,000 years after the beginning of the expansion
D)It is brightest in the ultraviolet part of the spectrum

Question

Quizplus · Accepted Answer

The cosmic background radiation was produced a few 100,000 years after the beginning of the expansion. This corresponds to the time when the Universe cooled down enough for neutral atoms to form, allowing photons to travel freely through space.

Option A is incorrect as the cosmic background radiation is isotropic, meaning it has the same intensity in all directions.

Option B is incorrect as the cosmic background radiation was not produced by stars but rather is a consequence of the early Universe's temperature and density fluctuations.

Option D is incorrect as the cosmic background radiation is in the microwave part of the spectrum, not the ultraviolet part.

Which of the Following Is True of the Cosmic Background