🚀 go-pugleaf

On Feb 8, 8:45 pm, Tom Roberts <tjroberts...@sbcglobal.net> wrote in
sci.physics.relativity:
> Paul B. Andersen wrote:
> > A diffraction grating spectrometer measures the wavelength.
> >  lambda = d sin(phi)  where d is the grating period.
> > The spectral lines only tell the wavelength shift.
> > It says nothing about the speed and the frequency.
> > It is experimentally proved that wavelength is Doppler shifted.
>
> Right. Moreover, OTHER experiments show that the frequency is also
> shifted (e.g. police radar guns). And surprising only to those who
> refuse to understand SR, the two shifts are such that
>         speed = frequency * wavelength
> remains constant.
>
> Tom Roberts

Roberts Roberts now you and your brother Andersen will have to explain
why the Doppler shift is so radically different from the gravitational
redshift where, as a message of yours of Jan 19 2008 implies, the
SPEED OF LIGHT and the FREQUENCY are shifted whereas the wavelength
remains constant:

http://groups.google.com/group/sci.physics.relativity/browse_frm/thread/e60ad8b8bd890c74?
Tom Roberts, message of Jan 19, 2008:
Pentcho Valev:  "Roberts Roberts, Einstein's 1911 equation c'=c(1+V/
c^2) is consistent with the gravitational redshift factor 1+V/c^2
confirmed experimentally by Pound and Rebka."
Tom Roberts: "Sure."

Now Roberts Roberts if you and your brother Andersen want to make the
Doppler shift and the gravitational redshift analogous, then both of
you should declare explicitly that Einstein's 1911 equation c'=c(1+V/
c^2) is wrong, both of you should replace it with the "true" equation
c'=c (that is, the speed of light is CONSTANT in a gravitational
field), and finally both of you should declare, solemnly, that for
both the Doppler shift and the gravitational redshift:

"the two shifts are such that
         speed = frequency * wavelength
remains constant."

Pentcho Valev
pvalev@yahoo.com