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Date: | Fri, 18 Jul 2008 10:58:54 -0500 |
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It seems to be very well settled that the speed of light (c) is a fixed
constant that is not influenced by the relative speed of the observer. It
is about 186,282.397 miles per second in a vacuum. c remains a constant
irrespective of the relative speed of the observer with respect to the light
source. In other words, an observer moving towards the light source
measures the same c as well as that measured by an observer moving away from
the light source.
It is also true that ancient galaxies exhibit a red shift in the observed
light as viewed from earth. This is due to the doppler shift which
indicates that the galaxy is moving away from us.
The question that I have is that a doppler shift (or red shift) is not
possible unless the light being observed is moving slower (causing a longer
wavelength) at the point of observation than the light that is emitted from
the point source. However it is not possible for the speed of light to be
slower than c at the point of observation irrespective of the relative
velocities between the source and observer.
Can anyone explain how a doppler shift can the observed from an ancient
galaxy if the speed of light does not change?
Jack Cannon
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