World Science Scholars
38.2 Twin Paradox: The Twins Communicate
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How could the mere act of turning around make such a difference in how much George and Gracie age?
Compared to an observer’s own clock, another clock that’s in motion ticks off time slowly. So, apart from the accelerated section of the scenario, what gives with George and Gracie each seeing the other wave quickly — time elapsing quickly?

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