Abstract
MILNE1 and Page2 have attempted to build up relativistic theories without employing the concepts of rigid body or absolute clock. Now we can certainly abandon one of these concepts. The possibility of getting rid of the rigid body (assuming an absolute clock) was pointed out by me some time ago3, while (assuming rigid bodies) we can avoid the absolute undefined clock by employing a light ray oscillating between mirrors at the end of a rigid rod. But to proceed with neither concept, as Milne and Page appear to do, is not possible.
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References
E. A. Milne, ” Relativity, Gravitation and World-Structure” (Oxford, 1935).
L. Page, Phys. Rev., 49, 254–268 (1936).
J. L. Synge, NATURE, 108, 275 (1921).
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SYNGE, J. Equivalent Particle–Observers. Nature 138, 28–29 (1936). https://doi.org/10.1038/138028a0
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DOI: https://doi.org/10.1038/138028a0
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