Which statement is INCORRECT about Cosmic Microwave Background radiation?(2 points)

Responses

it appeared only a few years ago
it appeared only a few years ago

It appears uniformly across the universe.
It appears uniformly across the universe.

its temperature is uniform.
its temperature is uniform.

it consists of electromagnetic radiation that is a remnant of the Big Bang

1 answer

The incorrect statement about Cosmic Microwave Background (CMB) radiation is:

it appeared only a few years ago.

This statement is incorrect because CMB radiation originated shortly after the Big Bang, approximately 380,000 years after the event, not just a few years ago. The other statements are correct: CMB radiation does appear uniformly across the universe, its temperature is approximately uniform (with slight fluctuations), and it is indeed electromagnetic radiation that is a remnant of the Big Bang.