(July 6, 2012 at 12:56 am)Chuck Wrote: At time of recombination, the temperature of the universe was 4000 degrees K, this was decidedly within the visible range.
I get this point. Stimbo also mentioned transparency. To me this just means that existing photons were no longer subjected to constant scattering and I agree that some of the newly 'freed' photons had an energy within the visible spectrum.
I also suggest that we would still refer to the universe as dark at this time until the formation of stars.
