On Wednesday, January 29, 2020 at 3:23:16 AM UTC-7, smitra wrote: > > On 29-01-2020 10:31, Alan Grayson wrote: > > On Wednesday, January 29, 2020 at 1:57:25 AM UTC-7, Alan Grayson > > wrote: > > > >> Considering the distant galaxies, they're receding at near light > >> speed. So according to SR, their clocks should be ticking at a much > >> slower rates than, say, a local clock in our galaxy. OTOH, there's a > >> physical clock for the entire universe; namely, the temperature of > >> the CMBR. If we tell time by this clock, all clock readings of all > >> galaxies are identical. So which is it? Are clocks in distant > >> galaxies running slower than a local clock in our galaxy, or are > >> both clocks running at the same rate? TIA, AG > > > > Obviously, the temperature of the CMBR declines exceedingly slowly, > > making it an inconvenient clock, but it's still a clock, making the > > question above sensible. AG > > > It's equivalent to a purely SR problem with 3 observers, two of them > moving away with opposite velocities from the third. > > Saibal >
TY, but I can't relate your comment to the issue I've raised. 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/2b5da3e0-36ff-464d-a0b0-64e1e0c92d97%40googlegroups.com.
