Physics, 26.11.2019 21:31 frisha

The universe is filled with photons left over from the big bang that today have an average energy of about 4.9 ✕10-4 (corresponding to a temperature of 2.7 k).

what is the number of available energy states per unit volume for these photons in an interval of 4 ✕10-5ev?

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The universe is filled with photons left over from the big bang that today have an average energy of...

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