Question

Which best describes cosmic microwave background radiation?

radiation thought to exist but not yet measured
radiation predicted to exist in millions of years
radiation that existed before the big bang
leftover radiation from the big bang

Answer 1

It would be leftover from the big bang. This was discovered by accident in the 1960s by a primitive weather satellite, and this is the theory that the evidence fits so far.

Answer 2

The correct answer is option D

The cosmic microwave background radiation can be defined as the remnant from the early stage of the universe in the Big Bang Theory. This term was also known as "Relic Radiation"

The discovery of this radiation is the landmark evidence of the Big Bang theory of origin of Universe.

This is the oldest electromagnetic radiation that glows strongest in the microwave region of the radio spectrum.