twin paradox

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twin paradox

n
(General Physics) a phenomenon predicted by relativity. One of a pair of identical twins is supposed to live normally in an inertial system whilst the other is accelerated to a high speed in a spaceship, travels for a long time, and finally returns to rest beside his twin. The travelled twin will be found to be younger than his brother
References in periodicals archive ?
Albrecht calls this time-choice conundrum the clock paradox, described with his UC Davis collaborator Alberto Iglesias in a paper published this year in Physical Review D.