Re: Syncronized atomic clocks

From: Sam Wormley (swormley1_at_mchsi.com)
Date: 06/12/04 

Date: Sat, 12 Jun 2004 02:27:09 GMT

Jim Greenfield wrote:
>
> Sam Wormley <swormley1@mchsi.com> wrote in message news:<40C93E1B.ACA20B6A@mchsi.com>...
> > Jim Greenfield wrote:
> > >
> > > Go for it! EMR "must" be emitted from the parent particle at the same
> > > v for all wavelengths, and travel "together", or else distant objects
> > > could appear to change position depending which frequency was used to
> > > observe them. It would make astronomy a darn sight easier, if some
> > > stars switched on for short periods only, and others emitted at one
> > > frequency only :-(
> > >
> >
> > There are plenty of pulsars that do that, Jim, provide periodic
> > bursts of photons.
>
> I am well aware of that, but unless the period was more than the
> transit time of the pulse, we would still be unsure which pulse we
> were seeing (the sun flicking on for one second every ten minutes :-)
> )
> >
> > o The speed of light is constant, c
> >
> > o The photons are independent of each other. Some of them happen to
> > fall onto the eyes or instruments of an observer. The position
> > appears to be a point far away (the Sun being an exception with
> > angular extent of about 30 minutes of arc.
> >
> > o The photon's wavelength was determined at the time it was emitted
> > by the star. The usual equations apply, such as E = hf = h_bar omega
>
> I maintain wavelength AND photon velocity at that time, both of which
> may have been subjected to change in transit due to collisions or
> gravitational effects.
>
> Have you ever noticed bird formations (v's)? I know they do this for
> aerodynamic energy conserving reasons, but maybe groups of photons
> "share" momentum/wavelengths (harmonics)
>
> Regards
> Jim G

  Velocity is constant.
  Look up Doppler Shift -- we can use that to determine velocity wrt
  an observer.

Relevant Pages

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  • Re: Relative speed...
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  • Re: simple but deep!
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  • Re: Syncronized atomic clocks
    ... >> could appear to change position depending which frequency was used to ... >> observe them. ... > There are plenty of pulsars that do that, Jim, provide periodic ... > o The photons are independent of each other. ...
    (sci.physics)
  • Re: Superposition
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