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Date: | Fri, 18 Jul 2008 09:33:13 -0700 |
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ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
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It's the frequency that changes, not the speed.
Jack Cannon wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related
> institutions.
> *****************************************************************************
>
>
> 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
> [log in to unmask]
>
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--
Wayne Watson (Watson Adventures, Prop., Nevada City, CA)
(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet
"We are operating this planet like a business in
liqudation." -- Al Gore, 2006
Web Page: <www.speckledwithstars.net/>
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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.
The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit
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