On Wednesday, March 20, 2019 at 10:08:53 AM UTC-6, John Clark wrote: > > On Wed, Mar 20, 2019 at 9:16 AM <[email protected] <javascript:>> wrote: > > * > how does GR establish the Principle of Relativity (for accelerating >> frames)? AG * >> > > It doesn't, Einstein never said everything is relative. Unlike velocity > there is such a thing as absolute acceleration, if that were not true the > Twin Paradox could not be resolved. > > John K Clark >
In the TP we're comparing an inertial frame with an accelerating frame; not the general case I was referring to for accelerating frames. But I'm confused, again. Don't Einstein's field equations take the same form in all frames, and isn't this the Principle of Relativity for gravity? 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 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.
