The twin paradox is a thought experiment in special relativity that illustrates the effects of time dilation, where one twin travels at a significant fraction of the speed of light while the other remains on Earth. Upon reuniting, the traveling twin is younger than the twin who stayed behind, highlighting the counterintuitive nature of time in relativistic contexts. This scenario emphasizes the implications of the postulates of special relativity, particularly how time is experienced differently for observers in relative motion.
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