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The Order of Magnitude of the Background Radiation Intensity at the End

Question 19

Multiple Choice

The order of magnitude of the background radiation intensity at the end of the radiation-dominated era was 1011 W/m2.How long after the big bang did the radiation dominant era end?


A) 1010 s
B) 1012 s
C) 109 s
D) 1011 s
E) 1013 s

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