The twin paradox applies in the context of black holes, where two particles falling together can experience different elapsed times due to their paths through spacetime. When one particle accelerates away from the other, it can return to find that the other has aged more, depending on their trajectories. The discussion emphasizes that the specifics of their paths and the nature of spacetime, particularly in curved geometries like those near black holes, determine the outcome. The twin paradox illustrates the non-intuitive nature of time dilation in general relativity.
PREREQUISITESPhysicists, students of general relativity, and anyone interested in the effects of gravity on time and the nature of spacetime.