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Astronomers predicted that radiation would be present in the form of microwaves as
evidence for an expanding universe. Why would they predict microwaves as opposed t
something like gamma rays or X-rays?

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shivshankarsah24

Answer:

The cosmic microwave background (CMB) is thought to be leftover radiation from the Big Bang, or the time when the universe began. As the theory goes, when the universe was born it underwent a rapid inflation and expansion. ... The CMB represents the heat left over from the Big Bang.

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