View Single Post
Dec30-11, 09:35 AM
Sci Advisor
PF Gold
P: 6,166
Quote Quote by timmdeeg View Post
Simply arguing, I would say that clock B suffers a combined effect of SR (twin paradox) and GR (gravitational time dilatation), both of which slow clock B down compared to clock A.
Yes, this is basically why I said I would expect clock B to show less proper time than clock A when they meet again. But I'm not sure I would describe the "SR" effect as just like the twin paradox, because B is in free fall the whole time so the usual arguments about the "twin paradox" do not apply (B does not have to feel any acceleration in order to get back to meet up with A again; in fact, it's A who feels the acceleration in this scenario, not B, which may have been what prompted the OP's question).