🚀 go-pugleaf

Koobee Wublee schrieb:
> On Jan 23, 1:09 pm, Dieter Heidorn schrieb:
> 
>>Koobee Wublee schrieb:
> 
>>>These are not experimentations on deflection but measurements in speed
>>>delay or rather gravitational time delay.  <shrug>
>>
>>These _are_ experiments on light deflection. Please have a look at
>>
>>http://arxiv.org/abs/gr-qc/0510072
>>
>>pages 33 - 35.
> 
> Have you not noticed that there are all claims and no specific
> experiments shown with analyzable data given?
> 

See page 1:

"Abstract
The status of experimental tests of general relativity and of
theoretical frameworks for analysing them is
      _reviewed_."

To all listed experiments are given references, for instance concerning
light deflection:

[165] Lebach, D.E., Corey, B.E., Shapiro, I.I., Ratner, M.I., Webber,
J.C., Rogers, A.E.E., Davis, J.L., and Herring, T.A., �Measurement of
the solar gravitational deflection of radio waves using
very-long-baseline interferometry�, Phys. Rev. Lett., 75, 1439�1442, (1995).

[241] Shapiro, S.S., Davis, J.L., Lebach, D.E., and Gregory, J.S.,
�Measurement of the solar gravitational deflection of radio waves using
geodetic very-long-baseline interferometry data, 1979�1999�, Phys. Rev.
Lett., 92, 121101, (2004).

[116] Froeschl�e, M., Mignard, F., and Arenou, F., �Determination of the
PPN parameter gamma with the Hipparcos data�, in Proceedings from the
Hipparcos Venice �97 Symposium, Proceedings of the symposium held on
13-16May 1997, (ESA, Noordwijk, Netherlands, 1997).

...and so on.

>>The distance Earth - Venus when Venus stands between Earth and
>>Sun can be measured by measuring the travel time of reflected radar
>>signals. In combination with the data of Venus' orbit you get the
>>distance needed for the Shapiro-Experiment.
> 
> I am still not convinced this 240uSec is qualified.
>

Irwin I. Shapiro et al.: Fourth Test of General Relativity: New Radar
Result. In: Physical Review Letters 26, 1971, S. 1132 - 1135

> Thus, the delay time is
> 
> dt = (4 G M / c^3) ln(4 a_E a_V / R^2)
> 

Agreed :-)

>>Starting with the equation
>>
>>c' = c (1 + kV/c^2)
>>
>>     k = 1: 1911
>>     k = 2: 1916
> 
> However, this does not mean
> 
> C(r) = c (1 + 2 U), k = 2
> 
> Or
> 
> C(r) = c (1 + U), k = 1
> 
> Under the concept of GR, the speed of light must be the same
> everywhere.  That is
> 
> C(r) = c
> 

The difference between local and non-local must be considered - but we
had that discussed already. I think we can end here.

Thanks for the discussion.

-----

I have collected my remarks concerning variable speed of light in GR on
my homepage. Maybe you're interested to take a look:

http://www.d1heidorn.homepage.t-online.de/Physik/VSL/VSL.html

Dieter Heidorn