To all, I wrote stuff at 1 a.m. this morning that I reviewed in the light of day.Chronos, I looked at my comment about physicists not agreeing on the expansion of spacetime. The fact of spacetime expansion was not what I meant was at issue. You surely have the right to question how many...
Marcus, The speed of the expansion of the universe at the time of the CMB emissions was extreme. It was, as I recall, just after the time of inflation. (Correct me if I am wrong; I am not taking the time to look it up.) You don't have to sum every photon in a string of photons to get the...
Re: conservation of energy universally -- Gravity is generally considered negative energy. Matter and energy are equivalent; so we will call them both energy for the purposes of this comment. Energy in the form of matter and the energy associated with it are considered positive energy. The...
Drakkith, You are right. More, lower energy photons are not being produced by the expansion of space; but every photon is a wave that travels through space creating, in effect, the "appearance" of a long wave passage, a long string of individual photons. The emitting object can be considered...
Drakkith, The definition of doppler shift is the changing of frequency due to the approach or recession of the object producing the vibration, whether sound or light, to or from the observer. In the case of sound, the air between doesn't expand. In space, we say that spacetime expands, but...
Just a quick reply about where the energy goes when the expansion of spacetime "stretches" the frequency of light: The light had a higher frequency over a shorter distance before expansion. After expansion it has a lower frequency over a longer distance. Higher frequency, greater energy...
Your idea of spacetime existing in the equivalent of quanta in matter and energy is pretty much what I am thnking, as well as others. See the latest Scientific American, Feb. 2011. The article on pg. 30 is entitled Is Space Digital? by Michael Moyer. Re: growing, expanding and stretching...
We have to be careful about saying what an outside observer can see. There is no way to be an observer outside the universe and no way to make a machine in the universe that can expand space. We can visualize scenarios; but what you're doing in this case is breaking the laws of physics so we...