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Old 28th Jan 2001, 19:52
  #6 (permalink)  
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On 22/11/1975, the U.S. navy performed an experiment when they flew a P3C carrying atomic clocks for 15 hours at a true speed fo 270 knots. Special relativity prdicted that elapsed time would be reduced by 5.6 nanoseconds.

However, General Relativity says that because the gravitation field was reduced, elapsed time would be greater by 52.8 nanoseconds. So overall, theory predicted that the crew aged by 47.2 nanoseconds more than they would have if they'd stayed on the ground.

The result of the experiment was that the atomic clocks said that 47.1 extra nanoseconds had elapsed. Yet again Einstein was right!


[This message has been edited by mik (edited 28 January 2001).]