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twin paradox
noun
- 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
twin paradox
- An effect predicted by the general theory of relativity : if one of a pair of twins remains on Earth , and the other travels in a rocket at a speed near the speed of light , the traveling twin will be younger than the earthbound twin upon returning to Earth. This effect has been verified experimentally by measurements with atomic clocks .
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