A related question regarding frequency shifts of photons is associated with the apparent changes associated with the expansion of space and the emission of photons from distant objects receding at a great velocity from a receptor/monitor on earth.
The explanation I have heard is that it’s like a Doppler shift associated with the classical idea of a source of sound losing frequency because of motion of the emitter away from the observer. This effect should be able to be seen to a lesser extent as a result of any galaxies moving away from Earth. I think it is observed in high energy experiments involving particles that decay as they move away giving off a reduced energy gamma (red shifted) when compared to a low energy particle. However, I do not think a red shift happens when a positron reacts with an electron both of which are receding from the observer at the same velocity. The observer always sees .511…. mev. photons—back to back with apparent conservation of momentum and energy. (It seems the source is a non-moving hole to the “other side”.) Stephen and/or Robin please correct me if I am wrong. A related question is whether the universal background EM radiation is due to the loss of energy from atoms as the space they are in expands, causing a longer average distance between their electrons and protons as time proceeds. (The expansion of space does not for some reason expand within galaxies, as far as I know, and hence there is no expansion that would effect dimensions of stable atoms—no aging of atoms possible.) If the above is accepted, it begs the question, where and why does the expansion of space cease to happen? And, iIs the progression of time somehow coupled to the universal expansion of space? Bob Cook From: [email protected] Sent: Saturday, December 10, 2016 5:18 PM To: [email protected] Subject: Re: [Vo]:Newtonian Gravity and General Relativity inside a sphericalshell. In reply to David Roberson's message of Sat, 10 Dec 2016 01:54:41 -0500: Hi, [snip] >I agree that a phase shift would occur due to normal path length differences. >What I am wondering about is whether or not that basic shift would have an >additional component that depends upon the magnitude of the gravitational mass >contained within the sphere's shell assuming that the path lengths do not vary. > >For example, have a very small mass sphere and use the phase detector to >obtain a reference. Then, greatly increase the mass as you maintain the same >inner volume and hence total reflection path. Compare the phase difference in >case 2 versus case1 when using the unaffected external photon. > >Dave ...now that might be an interesting experiment. You could use two concentric spheres, and fill the space between with water. Unfortunately, I suspect that temperature variations would have a larger effect than that which you are trying to measure, since temperature variations would change the size of the sphere(s), and hence the path length. Try doing the math, and see if you can get a figure for the minimum temperature variation that would be needed to drown out your signal. That should give you an idea of how hard the experiment would be to do. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
