*And I should add that the longest proper time between two timelike-separated events comes from the geodesic, which is the free-fall path.*
* John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* tfi On Wed, Oct 1, 2025 at 9:19 AM John Clark <[email protected]> wrote: > > On Wed, Oct 1, 2025 at 8:29 AM Alan Grayson <[email protected]> > wrote: > > *> Have physicists in the last 120 years claimed that two paths of >> different lengths in spacetime which start and end at same events, have the >> same accelerations, except Brent in his diagram? AG* > > > *In a word, yes. Two worldlines between the same events in spacetime can > have different lengths even if both involve acceleration. And proper time > is the length of your world line. But of course if they have identical > acceleration histories then they are in the same worldline, not a different > one.* > > * John K Clark See what's on my new list at Extropolis > <https://groups.google.com/g/extropolis>* > > > > >> >> >> wre >> >> >> -- >> 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 visit >> https://groups.google.com/d/msgid/everything-list/e6b4921c-82cc-40b8-a5a8-928d9bb7a7a7n%40googlegroups.com >> <https://groups.google.com/d/msgid/everything-list/e6b4921c-82cc-40b8-a5a8-928d9bb7a7a7n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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 visit https://groups.google.com/d/msgid/everything-list/CAJPayv0nU45JADV5JArkLpxM5n7Ba%2B3JCh5tGWxGofsX5tPeSg%40mail.gmail.com.
