Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics.relativity > #376641

Re: Einstein's Special Relativity: The Root of All Evil

Show all headers | View raw

On Saturday, February 20, 2016 at 8:04:07 AM UTC-7, Pentcho Valev wrote:
>
> On Saturday, February 20, 2016 at 4:26:46 PM UTC+2, Gary Harnagel wrote:
> >
> > On Saturday, February 20, 2016 at 3:44:04 AM UTC-7, Pentcho Valev wrote:
> > >
> > > If it was, then there would be no reasonable explanation for the fact
> > > that the frequency measured by the observer shifts from f=c/λ to
> > > f'=(c+v)/λ when the observer starts moving with speed v towards the
> > > light source.
> > 
> > But it DOESN'T shift to f'=(c+v)/λ.  It shifts to f'=c/λ'.
> 
> http://www.hep.man.ac.uk/u/roger/PHYS10302/lecture18.pdf 
>  Roger Barlow, Professor of Particle Physics: "The Doppler effect -
> changes in frequencies when sources or observers are in motion - is
> familiar to anyone who has stood at the roadside and watched (and
> listened) to the cars go by. It applies to all types of wave, not just
> sound.

Yes, the DOPPLER effect applies to all types of waves; however, technically,
light is NOT a wave, nor is it a particle.  It may be APPROXIMATED by either
in the appropriate circumstance.

> (...) Moving Observer. Now suppose the source is fixed but the observer
> is moving towards the source, with speed v. In time t, ct/λ waves pass a
> fixed point. A moving point adds another vt/λ. So f'=(c+v)/λ. (...)

Since the "observer" is specified as MOVING, then in what frame is this
"measurement" being made?  Obviously in the frame of the MEDIUM!  Where is
the "medium" for light?

> "Relativistic Doppler Effect (...) If the source is regarded as fixed and
> the observer is moving,

Once again, the sophistry enters the picture.  With respect to whom is the
observer moving?  From previous animations, it's a second (unmentioned)
observer who is stationary wrt the source.  We already KNOW what the
wavelength, frequency and speed is wrt source.

> then the observer's clock runs slow.

Actually, it doesn't.  It only APPEARS to run slow as measured by the second
observer.

> "They will measure time intervals as being shorter than they are in the
> rest frame of the source, and so they will measure frequencies as being
> higher, again by a γ factor: f'=(1+v/c)γf..."
> 
> That is, according to Roger Barlow,
> 
> f' = (c+v)/λ

He did NOT say that.  Stop putting your false words in his mouth.
Your equation is completely false because MEASUREMENT refutes it.

> when v is low (relativistic corrections are negligible), and
> 
> f' = (1+v/c)γf = γ(c+v)/λ
> 
> when v is high.
> 
> Pentcho Valev

Baloney repeated is still baloney.  MEASURENT refutes your dishonest claim.

Gary

Back to sci.physics.relativity | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Einstein's Special Relativity: The Root of All Evil Pentcho Valev <pvalev@yahoo.com> - 2016-02-20 02:44 -0800
  Re: Einstein's Special Relativity: The Root of All Evil Gary Harnagel <hitlong@yahoo.com> - 2016-02-20 06:26 -0800
    Re: Einstein's Special Relativity: The Root of All Evil Pentcho Valev <pvalev@yahoo.com> - 2016-02-20 07:04 -0800
      Re: Einstein's Special Relativity: The Root of All Evil Gary Harnagel <hitlong@yahoo.com> - 2016-02-20 09:16 -0800
    Re: Einstein's Special Relativity: The Root of All Evil Stzepan Zdrobněliny <stzepan282@guadalajara.org> - 2016-02-20 16:36 +0000
      Re: Einstein's Special Relativity: The Root of All Evil Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-20 18:26 +0100
        Re: Einstein's Special Relativity: The Root of All Evil Stzepan Zdrobněliny <stzepan282@guadalajara.org> - 2016-02-20 17:41 +0000
    Re: Einstein's Special Relativity: The Root of All Evil Stzepan Zdrobněliny <stzepan282@guadalajara.org> - 2016-02-20 17:50 +0000
      Re: Einstein's Special Relativity: The Root of All Evil Helmut Wabnig <hwabnig@.- --- -.dotat> - 2016-02-20 19:05 +0100
  Re: Einstein's Special Relativity: The Root of All Evil Pentcho Valev <pvalev@yahoo.com> - 2016-02-21 10:25 -0800
    Re: Einstein's Special Relativity: The Root of All Evil Pentcho Valev <pvalev@yahoo.com> - 2016-03-13 01:17 -0800
      Re: Einstein's Special Relativity: The Root of All Evil Iephthae Sparrow <yvosp@gideoncloud.net> - 2016-03-13 11:43 +0000
      Re: Einstein's Special Relativity: The Root of All Evil Gary Harnagel <hitlong@yahoo.com> - 2016-03-13 10:32 -0700

csiph-web