Re: Inflationary Theory ; I'm confused
From: Jim Byrd (byrd_at_NOSPAM.acm.org)
Date: 01/19/05
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Date: Wed, 19 Jan 2005 06:34:28 -0500
On Tue, 18 Jan 2005 10:45:24 GMT, "Rob Dekker" <rob@verific.com>
wrote:
>
>Over the past couple of years, I've read various articles
>about the Big Bang Theory. Part of that is a theory
>proposed by Groth, which states that the early Universe went
>through a period of very rapid expansion called 'inflation'.
The name is Guth.
>
>I understand that the inflation theory was
>invented to explain the 'flat-ness' of space and the
>MBR isotropy (microwave background indicates that
>the early Universe had a very consistent high temperature).
>
>I am confused about this inflationary period.
>
>I've read somewhere that the Universe expanded to
>a size of 40 million light years within a miniscule time.
>This would clearly violate the limitation of the speed
>of light.
Objects cannot move faster than light through space.. That doesn't
mean that space itself can't expand faster than light.
>
>I don't see why a speed-of-light violation would be needed :
>Why would there be any observable difference between
>a Universe expanding at speed of light and a Universe
>that expands faster than that ?
>
>I've read somewhere else that the Universe expanded
>from almost a point to (only) 1 meter in size after the
>inflatory period of 10^-32 sec. But a 1 meter ball of fire
>would probably be very consistent in temperature, which
>was the original reason to invent inflation theory.
>
>So either way (1 meter or 40 million light-years) I don't
>see what inflation theory is actually explaining beyond
>a Universe which expands at light speed.
>
>Can anyone shed some light on this ?
The best way to get a layman's understanding is to read Guth's book.
He indicates how things work without getting into the detailed
mathematics. Get the book.
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