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Re: Quasars Vs The Big Bang/OPAQUE??

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Posted by yanniru/">yanniru on June 15, 1999 12:55:21 UTC

: R.T.: : Opaque medium? Now what would that be made up of? : yanniru: : FREE ELECTRONS---just like a conductor, which has free electrons. The electrons absorb and re-emit all photons. It is only when the free electrons get attached to nuclei to form atoms at 300,000 years after the big-bang that light has a chance to propagate freely. : Greg: : If the primordial Universe inflated ?according to superstring theory? at the moment of "last scatter" and determined the present temperature variation in the 3k environment that permeates the Universe, how did protons propagate freely since they would likewise have been confined to the speed of light as was the 3k environment?

Dear Greg: Inflation happened (assuming that it did happen) when the universe was still a vacuum. Therefore no proton problem. Inflation of a vacuum can be derived in several ways. The foremost is from General Relativity and next from GUT theories. The best string solutions, which can be found at http://www.to.infn.it/~gasperin/ , do not yet reproduce the solutions of GR and GUT theories. In string theory, inflation is driven by the dilaton field and from duality inflation turns out to be equivalent to deflation. Gasperini uses accelerated deflation to solve the flatness and horizon problem, but he can't get rid of the magnetic monopoles that way. So string theory still has some inflation difficulties. The inhomogeniuties in the 3K field did come from the amplification of quantum fluctuations at the moment of creation. But the moment of last scatter happened 300,000 years later and the 3K field we see today is just a 3000K snapshot of the inhomogeniuties in the universe at 300,000 years of age.

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