twins paradox

Philosophy dictionary. . 2011.

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  • twin paradox — noun A phenomenon suggested by the theory of relativity which imagines a scenario in which one of a pair of twins lives in the normal way, while the other twin is sent out in a spaceship travelling at great speeds, with the effect that the… …   Useful english dictionary

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  • Proper time — In relativity, proper time is time measured by a single clock between events that occur at the same place as the clock. It depends not only on the events but also on the motion of the clock between the events. An accelerated clock will measure a… …   Wikipedia

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