Re: Mass vs distance

"Ray Tomes" . wrote

I don't think there is any effect of light rising in a gravitational
field. I think that it is emitted at a different frequency to start
with. This may not be conventional wisdom, but if someone disagrees, can
they please explain the following...

Suppose that we have a very accurately tuned radio transmitter at the
bottom of a hill and a similarly tuned one that we took up the hill. At
the top of the hill we count the oscillations of each. We do know that
they are different (called gravitational redshift). However if the
difference is something that happens to the waves on the way up, then
the number of waves between the two locations must be steadily changing
over time. This would violate the assumption that the hill has a certain
height and that the speed of light is constant. This is totally
unreasonable. Therefore it is the frequency of the transmitter that must
change when we take it up the hill. Comments or refutations welcome.

As I understand it, if a transmitter at the bottom of the hill in
principle emits a series of pulses, a receiver at the top receives the
same number of pulses, but at a lower rate over a longer period.

While I think I understand about the energy of a mass raised and
lowered in a gravitational field, or between the top and bottom of an
accellerating lift, it is not clear to me how the total energy of a
group of doppler shifted waves can change in the same way, when
amplitude is exchanged with period. Obviously the frequency is less,
implying less energy, but the overall duration is more, making up for
it. Or is it not so?

I imagine that as a clock and a rod rise in a gravitational field, the
clock runs faster and the rod gets longer so that the speed of light
remains constant at every level. Is this a reasonable view?

All the best

Ian Macmillan

.

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