Murray, W. A. Scott
/Journal Reprints-Relativity Theory/Download/3329
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Development of the caesium clock as a practical instrument let in 1971 to an experiment to verify Einstein's prediction of the "dilation of time", and its successful outcome helped to clarify certain aspects of interpretation in relativity theory. But a question remains: one prediction by Einstein concerning the relative rates of polar and equatorial clocks -- has not been borne out in practice. It seems that the explanation which was originally put forward to account for this failure itself contains a flaw, so that the topic now requires a further round of attention from physicists and philosophers.
February, 1987: "Relativity" [Jones_Elect&WW_v93n1612(1987)183.PDF]
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