Measuring measuring rods

Philosophy of Science 32 (1):39-56 (1965)
In this paper, we show that a restricted form of time travel both accords with special relativity kinematics and avoids several prima facie objections. We argue that such time travel provides a reasonable way to interpret certain phenomena which can readily be described, and the analogues of which have already been observed at the level of elementary particle reactions. We then describe how a time-traveling object could measure itself, and demonstrate how, in the appropriate circumstances, such an experiment could convince a theorist who insisted on a single criterion for length measurements that his standard had itself changed in length. The same experiment can shed light on the possibility of detecting a universal expansion; and we show that, given certain experimental results, one must conclude that every member of a class of time travelers has changed in length simultaneously, though perhaps only while going backwards in time
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DOI 10.1086/288026
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Some Philosophical Aspects of Particle Physics.M. L. G. Redhead - 1980 - Studies in History and Philosophy of Science Part A 11 (4):279-304.
On Travelling Backward in Time.Robert Weingard - 1972 - Synthese 24 (1-2):117 - 132.

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