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Home Q & A Board Science-Related Homework Help Physics
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doit_the_clown doit_the_clown
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7 years ago
What change occurred at the time that the universe ceased being radiation-dominated?

(a)   The gravitational effects of matter began to dominate over the gravitational effects of radiation.
(b)   Electrons combined with protons to form neutral hydrogen atoms, and the universe became transparent to radiation.
(c)   Inflation ended, and the universe resumed expanding at a slower, more normal rate.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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hyponoticahyponotica
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7 years ago
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doit_the_clown Author
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7 years ago
Smart ... Thanks!
halyna
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Yesterday
Thanks for your help!!
Ivansitospeed@g
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2 hours ago
This site is awesome
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