On Tuesday, January 1, 2019 at 8:25:11 AM UTC, [email protected] wrote: > > > > On Monday, December 31, 2018 at 12:43:17 AM UTC, John Clark wrote: >> >> On Sat, Dec 29, 2018 at 10:53 PM <[email protected]> wrote: >> >> *> Where does the non conserved energy go, specifically the loss of >>> energy represented by the cosmological red shift? AG* >> >> >> If it's non-conserved then the energy went into infinite unbounded >> homogeneity, that is to say into nothingness. At the cosmological level >> under General Relativity energy is not conserved. It's still true that in a >> FIXED volume the energy gained or lost within it is equal to the energy >> passing through its boundary, but if the total volume of the universe is >> not conserved, as it isn't under General Relativity, then energy isn't >> either. >> >> As Sean Carroll says: >> "*in general relativity spacetime can give energy to matter, or absorb >> it from matter, so that the total energy simply isn’t conserved *" >> >> *> are you saying the small temperature fluctuations due to quantum >>> effects were *preserved* by inflation, and if it didn't happen those >>> fluctuations would be *larger* than what's observed? AG* >> >> >> 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, but with inflation they >> had grown so large there was not enough time for them to come into thermal >> equilibrium with their neighbors. >> > > *I don't get it. Without inflation, the universe still expands FTL so > other than the local region for an observer, all other regions remain NOT > causally connected. All inflation does is preserve the temperature > distribution when it begins, almost immediately after the BB. IOW, I don't > see how inflation explains the virtually uniform temperature of the CMBR. > AG* >
*Correction: I didn't apply Hubble's law correctly, so 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, So the CMBR will just reflect that original temperature distribution and inflation doesn't cause it to be nearly uniform. It will be whatever it was when inflation began. AG * > > >> 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.
