10 Apr
2014
10 Apr
'14
8:07 a.m.
I did a Google search on "photon conservation" & came up with nothing (there were discussions of _preserving_ as many photons as possible in detectors, but that was completely different). If there is such a notion of photon conservation, that would be a valuable insight. Do you have any links or references? At 11:14 AM 4/9/2014, Eugene Salamin wrote:
As the universe expands, the number of photons is conserved, and the wavelength of each photon lengthens proportionally to the expansion.