The Hafele-Keating Experiment was a groundbreaking test conducted in 1971 that demonstrated the effects of time dilation as predicted by Einstein's theory of relativity. This experiment involved flying atomic clocks around the world on commercial airliners and comparing their time readings with those of clocks that remained stationary on the ground. The findings validated the theory of relativity by showing that the moving clocks experienced less elapsed time than the stationary ones, illustrating how speed and gravitational potential affect time measurement.
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