On Sunday, December 23, 2018 at 3:04:07 AM UTC, Bruce wrote: > > On Sun, Dec 23, 2018 at 1:17 PM John Clark <[email protected] > <javascript:>> wrote: > >> On Sat, Dec 22, 2018 at 6:46 AM <[email protected] <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 [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.
