On Tuesday, January 1, 2019 at 6:24:03 PM UTC, John Clark wrote: > > On Tue, Jan 1, 2019 at 3:41 AM <[email protected] <javascript:>> wrote: > > >> *> not all points external to an observer are receding at speed faster >> than light. Still, ISTM that inflation just preserves the temperature >> distribution which exists when it began,* > > > The idea is before inflation a small volume was able to achieve thermal > equilibrium within itself even though the universe was very very young > because the volume was so small. But then that small volume started to > expand faster than light and exponentially doubled in size at least 100 > times every 10^-35 seconds, and today that super tiny volume is our entire > observable universe. The FTL expansion is why very distant parts of the > CMBR are at almost exactly the same temperature even though today they are > not causally connected. >
But earlier you wrote that without inflation, the temperature anomalies would have been washed out anyway. Clark > If inflation didn't happen then after 380,000 years those spots of slightly higher and lower temperature would no longer exist because they would have been washed out by their surroundings ... . So without inflation, the CMBR would have *more* uniformity in temperature than what it was initially. That's why I stated that inflation preserved the initial imperfect uniformity in temperature, but wasn't the *cause* of the uniformity. AG And the random quantum variations that must have existed in that very tiny > volume before inflation started explains why the temperature of the CMBR is > *almost* the same everywhere but not exactly so. > > John K Clark > > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
