On Sunday, December 23, 2018 at 3:04:07 AM UTC, Bruce wrote: > > On Sun, Dec 23, 2018 at 1:17 PM John Clark <johnk...@gmail.com > <javascript:>> wrote: > >> On Sat, Dec 22, 2018 at 6:46 AM <agrays...@gmail.com <javascript:>> >> wrote: >> >> *> If the temperature was non uniform when the BB occurred, if it >>> occurred, why would a sudden increase in its volume, aka inflation, erase >>> or wash out those non uniformities?* >>> >> >> Regardless of how non-uniform the entire early universe may have been if >> you kept looking at smaller and smaller volumes you'd eventually find a >> size where thing were pretty uniform. >> > > On what do you bas that assumption? Penrose makes the point that there is > no reason to suppose that the initial state is not fractal -- grossly > unsmooth on any scale, right down to the smallest! > > >> If inflation theory is correct that small nearly uniform part of the >> universe started to expand exponentially; that is to say it had a fixed >> doubling time, every 10^-37 seconds the diameter of that small part of the >> universe doubled, and in 10^-35 seconds it doubled a hundred times and >> became our observable universe. It has continued to expand to this day but >> at a much much more leisurely rate. >> > > It has been pointed out many times that inflation is a model in search of > a problem to solve. Monopoles and flatness are not really problems, and > inflation does not solve the smoothness problem - vide above. >
*I've haven't resolved how inflation solves the smoothness problem (as many claim) -- maybe it can't and thus is the cause of my puzzlement -- but isn't the flatness problem a real problem that IS explained by inflation? If not, why? AG * > > Bruce > > >> >> >>> > *OTOH, if the initial temperature were uniform, would that obviate >>> the need for inflation, or would non uniformities tend to become manifest >>> were it not for inflation?* >>> >> >> Without inflation its very hard to understand how the temperature could >> be uniform because there wasn't enough time for the temperature to >> equalize, the distance parts of the universe were neven is causal comtact >> and yet they are at the same temperature to one part in 100,000. >> >> 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
