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Home Q & A Board Science-Related Homework Help Physics Astronomy
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cng cng
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2 months ago

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



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when protons and neutrons were first formed



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when the big bang first began to expand



▸

when gamma rays had enough energy to destroy nuclei



▸

when electrons began to recombine with nuclei to form atoms

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ASTRO

ASTRO


Edition: 3rd
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edatayedatay
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2 months ago
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cng Author
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2 months ago
Thank you, thank you, thank you!
karamsidhu1
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Yesterday
Thanks for your help!!
jasonbourne
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2 hours ago
You make an excellent tutor!
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