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RE: [ATM] Re: Quasar lightspeed
Actually the speed of light (in space) has been decreasing as measurements
are being made.. The decrease is believed to be real. In other words it is
not due to increased accuracy of the measurements....As I understand it,
this is explained that as space acquires more particles (gets denser) the
light moves slower.....The source of particles is the stars, escape from
other objects, etc... One thought was that light may have infinite speed if
measured in a complete vacuum....which apparently does not exist anywhere.
-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net]On Behalf
Of Arjan te Marvelde
Sent: Thursday, November 04, 2004 1:20 PM
To: atm@atmlist.net
Subject: [ATM] Re: Quasar lightspeed
Tommy,
Why would the speed of light not change on its way through spacer/time
towards us?
I can imagine that the laws of nature, and hence its constants like the
speed of light, actually depends on the state of the universe, and that it
is/was different in the place/time of the quasars. But why would the speed
of the light that is finally arriving here and now be different from any
other light?
Please explain, so I can understand your experiment.
/Arjan te Marvelde
> What we are trying to do is measure the speed of redshifted (quasar)
light.
>
> Why? Because there is an old version of General Relativity (de Sitter)
for
> which light is both redshifted and slowed at large distances. We think
> this version has been overlooked, and we wish to test it against the
> Standard Model. The quasar lightspeed measurement is the best way we can
> think of to differentiate these two theories, to make a test with an
> observable that clearly favors one or the other model. De Sitter predicts
that
>
> (quasar lightspeed) = c/(1+z).
>
> Karl Popper would approve: if the measured lightspeed of a quasar with
z=1
> is not half-normal, then this old version of GR (de Sitter) can't be
> correct. We have a disprovable prediction.
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