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Vern
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Posted: Thu Apr 23rd, 2009 01:30 pm |
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I just red the Ashmore's book, Big Bang Blasted. I'm now studying it to get it more clear in my mind. It seems that there is a clear difference that should end the Big Bang speculation. The Tired Light mechanism described in the book clearly predicts that the red shifted spectra from distant galaxies will be shifted more at the red end of the spectrum than at the blue end.
The expansion of space predicted by the Big Bang theory clearly predicts that the red end of the spectrum will be shifted the same amount as the blue end. It should be possible to look at example spectra and see what is the case.
I did not see a discussion of experimental results of this in the book. I'm going back through it now to see if it was there and I missed it.
Last edited on Thu Apr 23rd, 2009 01:31 pm by Vern
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Vern
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Posted: Thu Apr 23rd, 2009 02:37 pm |
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I did a quick Google and found this sample of spectra. I compared the lower spectra shift with the upper spectra shift and the upper seems to be shifted more.
Now I enlarge the area of interest. Does anyone have any more examples of this.
Last edited on Thu Apr 23rd, 2009 02:38 pm by Vern
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Vern
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Posted: Thu Apr 23rd, 2009 06:41 pm |
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Here is a larger image that shows the anisotropy a little better.
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lyndonashmore
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Posted: Sat Apr 25th, 2009 06:30 pm |
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Hi Vern.
Redshift z is the ratio of delta lambda /lambda. In the BB, Ashmore redshift and observation, photons of light at the red end of the sprectrum are shifted more than those at the blue end such that the ratio delta lambda /lambda ie 'z' is constant, This is not a problem for either me or the BB.
Cheers,
lyndon
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Vern
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Posted: Sat Apr 25th, 2009 07:25 pm |
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I have a difficult time getting this to square in my mind. It seems to me that both a Doppler effect and expanding universe effect should produce equal red shifts at each end of the spectrum. I wonder if this anisotropic effect is the same with sound waves.
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lyndonashmore
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Posted: Tue Apr 28th, 2009 05:50 pm |
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| I hadn't thought about sound and 'bassshift'. have to have a look
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Vern
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Posted: Wed Apr 29th, 2009 11:49 am |
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It is probably just me. Most people don't seem to have a problem understanding red shift as a percentage of frequency. But I visualize it as a two sine waves drawn on an elastic ribbon such that one is twice the frequency. Then stretch the elastic as in an expanding space. My intuition is that the change as a percent of wave length should be less for the longer wave length.
But since it is not a problem for either BB or Ashmore red shift mechanism I guess it is something we need not worry about.
The book is great, BTW; I think you described the Tired Light process very well.
Last edited on Wed Apr 29th, 2009 11:50 am by Vern
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Vern
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Posted: Wed Apr 29th, 2009 12:50 pm |
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Okay; it is just my bad thinking. I actually did the experiment, and the percentage works out.
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lyndonashmore
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Posted: Thu Apr 30th, 2009 09:16 pm |
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Thanks vern,
Glad you enjoyed the book.
Not 100% sure what you are on about re sound etc but ....
Light and sound are different.
With sound all frequencies travel at the same speed in a medium - otherwise the further one is from an orchestra the more jumbled the music!!
But with light, different frequencies travel at different speeds in a medium - hence the spectrum formed by a prism.
fascinating stuff is light .
Cheers.
lyndon
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