On Sunday, March 17, 2019 at 2:49:43 AM UTC-6, Bruce wrote: > > On Sun, Mar 17, 2019 at 7:38 PM <agrays...@gmail.com <javascript:>> wrote: > >> >> >> On Thursday, March 14, 2019 at 8:27:58 PM UTC-6, agrays...@gmail.com >> wrote: >>> >>> IIUC, the combined mass of an electron and proton is larger than the >>> hydrogen atom they form at recombination time. Thus, I would expect a very >>> narrow pulse of energy as a result when recombination occurs. This >>> apparently being the case, why does the CMBR have a black body distribution >>> and not a pulse with a very narrow spread? TIA, AG >>> >> >> Is this a really dumb question and the reason for zero replies; or is it >> because no one here has the answer? Or maybe just no interest in another >> puzzle? AG >> > > Dumb question. CMB is thermal radiation, not the recombination energy. It > reflects the temperature at the time the universe became transparent to > radiation of all wavelengths -- because the electron-proton plasma > recombined to form less reactive hydrogen. > > Bruce >
But the recombination energy must be part of the mix at recombination time and this is never mentioned in the texts I have read. I suppose this is another dumb question. AG -- 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.
