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""no, it's because a gravitational field is equivalent to an accelerating frame of reference""Yes, precisely... and an accelerating frame of reference (GR), and a gravitational field increasing the rate of time (ITT), can be viewed as being equivalent. (the benefits of doing so result in a cyclic universe)Alan, I really do not understand why you find it so difficult to grasp this simple concept:If you are using a Doppler shift to measure a phenomenon, then the phenomenon you are measuring will be inherent with the properties of the measuring unit.How can the gravitational shift match, ie: 'harmonise with' the created Doppler shift if it were otherwise?
The man made Doppler shift in the Pound Rebka was 'not' a change in photon frequency at-all, Alan. They created the man made Doppler shift of the emitted gamma ray in relation to the receiving atom, to cancel out the gravitational shift of the gamma ray
The Doppler shift in the Pound Rebka is No. It isn't the vibration. It is caused by the vibration which at some point gave the emitter or detector a velocity such that the Doppler shift matched the gravitational shift.the man made speaker vibration of the emitted light source in relation to the motion of the receiving atom.The gravitational shift is the change in the gravitational field gradient.NJo, it is caused by the difference in gravitational potential between the emitter and the receiver.The Pound Rebka proved that the gravitational shift of the gravitational field has a frequency that can be harmonised with, and be cancelled out by a man made Doppler shift, (which was not a change in the frequency of a photon), created by speaker vibration and the motion of the receiving atom. PoppycockWhy would someone call a change in the gravitational gradient, ie: gravitational shift, a change in photon energy? Nobody does. Just stick to the words on the card, and don't try to add more. The gravitational shift causes a change in photon energy,no, it is a change in photon energy, caused by gravitational potential difference and in the case of any other particle with mass's energy, the gravitational shift causes a contrary (but not directly opposite) change in energy than it does with the photon,If this means anything, can you prove or explain it? but you cannot describe these energy changes in the photon or any other particle as the gravitational shift itself. The gravitational shift is the changes in the gravitational field, surely?No, it is the shift if photon frequency caused by the change in gravitational potentialEdit: ...and in reply to your edit: where does this v exist in the gravitational field within a static distance? It is the relative velocity of source and receiver - i.e. the determinant of Doppler shift. Nothing to do with gravitation.
velocity of Doppler shift
I repeat, it was the gravitational field, being measured.
whatever it is about gravitational potential that causes light to shift in energy and frequency has been cancelled out by this determinant of Doppler shift.
Does the vibration of the speaker, or the relative motion of the receiving atom, affect the energy and frequency of the gamma ray? No it doesn't.
Pound and Rebka countered the gravitational blueshift by moving the emitter away from the receiver, thus generating a relativistic Doppler redshift
Yes we can see that the determinate of the Doppler shift is a measure of what the gravitational shift of the gamma ray would have been, had it shifted energy and frequency.
But again I ask you, 'what' in the gravitational shift was 'cancelled out' in order for the gamma ray's energy and frequency 'not' to be shifted in the gravitational gradient?
**sigh** That timey eh? If you have to explain once you have to explain a Million times! Brain not in gear girl?
Quote from: timey on Today at 22:05:37Yes we can see that the determinate of the Doppler shift is a measure of what the gravitational shift of the gamma ray would have been, had it shifted energy and frequency.Now look at the physics. The frequency did indeed shift, exactly as predicted......
QuoteBut again I ask you, 'what' in the gravitational shift was 'cancelled out' in order for the gamma ray's energy and frequency 'not' to be shifted in the gravitational gradient?.....then they added a Doppler shift of equal and opposite magnitude, so that the received frequency was the same as the emitted frequency. What's the problem?
And what is causing the photon to G-shift?
In astrophysics, gravitational redshift or Einstein shift is the process by which electromagnetic radiation originating from a source that is in a gravitational field is reduced in frequency, or redshifted, when observed in a region of a weaker gravitational field. This is a direct result of gravitational time dilation - as one moves away from a source of gravitational field, the rate at which time passes is increased relative to the case when one is near the source. As frequency is inverse of time (specifically, time required for completing one wave oscillation), frequency of the electromagnetic radiation is reduced in an area of a lower gravitational field.
My theory says that the extra relative motion that the Pound Rebka measured as the G shift via the Doppler shift is caused by the photon moving through a slower rate of time in the weaker gravitational field.