physics question #3413



Hugo Verissimo, a 35 year old male from Lisbon asks on April 19, 2006,

Q:

We know that cosmic microwave background is 2.725 kelvin. We know universe was some 13Billion years old so we know that its radius is 13Billion light-years. So the question is: what is the total energy (in joules) of the cosmic microwave background?

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