- #1
Gary Boothe
- 15
- 0
I understand that because galaxies are receding from us due to the expanding universe, that we see a red shift in the light from these galaxies. If there is a red shift, the light loses energy, but where does this lost energy go? Is it that in the photon's reference frame there is no change in frequency, or is there some sort of radiation that is created, like cerenkov radiation. An answer would be appreciated.