The Cosmic Background Radiation Comes from a Time After the Origin

question 56

Multiple Choice

The cosmic background radiation comes from a time after the origin of the universe

• A) when protons and neutrons were first formed.
• B) when the big bang first began to expand.
• C) during the inflationary period.
• D) when gamma rays had enough energy to destroy nuclei.
• E) when electrons began to recombine with nuclei to form atoms.

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