送交者: gyro 于 2009-05-05, 16:52:14:
回答: The question is: without GR, how do you know if the clock is right? 由 steven 于 2009-05-05, 16:41:37:
My guess is, suppose for determining position the data received on the ground from a particular GPS sattelite requires an adjustment of x nanoseconds per day in practice, and relativity predicts an adjustment of y nonoseconds per day. I guess in practice x is only on the same order of y.