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The Cosmic Background Radiation Comes from a Particular Time After

Question 1

Multiple Choice

The cosmic background radiation comes from a particular time after the origin of the universe.What was that time?


A) when protons and neutrons were first formed
B) when the Big Bang first began to expand
C) when gamma rays had enough energy to destroy nuclei
D) when electrons began to recombine with nuclei to form atoms

Correct Answer:

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