- #1
sandrogiongo
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On the epoch of last scattering, the universe became transparent and the typical CMB photon was "free" to travel the universe. The corresponding radiation was of a black body temperature of ~3000K.
My question is: after the last scattering, the universe was still hot and, I presume, emitting radiation. Why, for example, we don't see a CMB corresponding to the epoch when the universe had 2000K, or 1500K?
My question is: after the last scattering, the universe was still hot and, I presume, emitting radiation. Why, for example, we don't see a CMB corresponding to the epoch when the universe had 2000K, or 1500K?