Re: Time dilation and expanding space

On Feb 28, 5:55 am, bz <bz+...@xxxxxxxxxxxxxxxxxxxx> wrote:
"Sue..." <suzysewns...@xxxxxxxxxxxx> wrote in news:1172642156.376982.237460
@k78g2000cwa.googlegroups.com:

The term nuclear-resonance is used by Pound-Snider
to describe a Mossbauer shift with altitude.

Are you sure that is how they used the term??

It is more likely that nuclear-resonance is used to describe the Mossbauer
effect itself, since the Mossbauer effect IS a nuclear resonance effect.

http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/mossfe.html

"Effect of Gravity on Gamma Radiation"
http://prola.aps.org/abstract/PR/v140/i3B/pB788_1

Effect of Gravity on Nuclear Resonance
R. V. Pound and J. L. Snider
Lyman Laboratory of Physics, Harvard University,
Cambridge, Massachusetts
Received 24 September 1964
http://prola.aps.org/abstract/PRL/v13/i18/p539_1

" The classical phenomenon of the redshift of light in a
static gravitational potential, usually called the gravitational
redshift, is described in the literature essentially in two ways:
On the one hand, the phenomenon is explained through the
behavior of clocks which run faster the higher they are
located in the potential, whereas the energy and frequency
of the propagating photon do not change with height. The light
thus appears to be redshifted relative to the frequency of the
clock. On the other hand, the phenomenon is alternatively
discussed (even in some authoritative texts) in terms of an
energy loss of a photon as it overcomes the gravitational
attraction of the massive body. This second approach
operates with notions such as the "gravitational mass" or
the "potential energy" of a photon and we assert that it is
misleading. We do not claim to present any original ideas
or to give a comprehensive review of the subject, our goal
being essentially a pedagogical one.
http://arxiv.org/abs/physics/9907017

IOW the bellhop can't have two dollars no matter who
tells you he does.

Sue...


--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+...@xxxxxxxxxxxxxxxxxxxx remove ch100-5 to avoid spam trap


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