Russell,

On Thu, 4 Mar 2004 15:23:10 +1300, Russell McMahon wrote:
>...<
> (eg progressively falling light speed does marvels for some
> theories but can produce universes which are dangerously young and therefore
> unacceptable)

Something has always puzzled me about light - if Einstein is right, how can it exhibit Doppler shift?  As I
understand it, the latter is due to the wave arriving at the receiver at a different speed from that with
which it left the transmitter, but if the speed of light is constant to the observer, how can it "slow down"
to give red-shift?

Cheers,

Howard Winter
St.Albans, England

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