Re: Special Relativity passes cosmological test

On Aug 18, 8:13 pm, Tom Roberts <tjroberts...@xxxxxxxxxxxxx> wrote:
GSR wrote:
Special Relativity has passed another test.
Certain quantum theories of gravity predict that
different high energy photons should travel at
different speeds through space, contradicting
relativity.  But new observations now show that
this idea is implausible.  Read all about it at
this link.
http://arxiv1.library.cornell.edu/abs/0908.1832

And yet other measurements now have a tantalizing difference in the
speed of high-energy gammas compared to lower-energy gammas and photons.
It's not yet confirmed, and could easily be an artifact of the source
rather than the space through which it propagated, but it's interesting
nevertheless. Even if it is only a few minutes out of billions of years.
It would be VERY interesting if this turns out to be an actual energy
dependence in propagation speed...


http://www.newscientist.com/article/mg20327210.900-late-light-reveals-what-space-is-made-of.html


A few authors writing about Mossbauer spectrometry go to the trouble
to distinguish gamma and x-rays as nuclear and atomic. If the nuclear
radio aperture is significantly small and a large regions on a path
are very sparsely populated with gas, it seems possible that
significant skew in the Ewald-Oseen extinction distance could build up
along the path.

For the Pound-Snider experiment, David F. Crawford writes:
<<... although the typical path length between the emission of
secondaries
of 11m is less than the length of the apparatus it is still much
longer
than the mean free path for coherent forward scattering that is the
quantum description of refractive index. In this scattering the
photon is absorbed by many electrons and after a short time delay
(half a period) a new photon with the same energy and momentum is
emitted. For these high energy gamma rays the binding energy of
the electrons can be ignored and the mean free path for coherent
forward scattering is given by the Ewald and Oseen extinction
length of X = 1/ (λr0 ne ) where λ is the wavelength and r0
is the classical electron radius. >>
http://arxiv.org/abs/astro-ph/9803009

That is a quantum computation that assumes interacting electrons
rather than an experiment that might reveal tunnelling to
the nucleus and a longer extinction distance.

I have doubt a vaccum representative of the actual interstellar
paths is achievable in our solar system but the conclusive
experiment might be exactly where I didn't look in the
day since this occurred to me.

~Ewald Extinction~
http://dx.doi.org/10.1119/1.19330

Sue...


Tom Roberts

.

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