On local and global measurements of the speed of light on rotating platforms

Details On local and global measurements of the speed of light on rotating platforms On local and global measurements of the speed of light on rotating platforms

1999-04-12

arxiv.org/abs/gr-qc/9904028v1

Found.Phys.Lett. 12 (1999) 179-186

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

LATEX, 8 pages, to be published in Foundations of Physics Letters

Scientific paper

The paper shows that, conceptually and operationally, the speed of light as measured locally in the inertial comoving frame of a point on the rim of a rotating disk, is different from the one measured globally for a round trip along the rim, obtained dividing the length of the rim (as measured in the ''relative space'' of the disk) by the time of flight of the light beam (as measured by a clock at rest on the disk). As a consequence, contrary to some recent claims, the anisotropy found in the global value, obtained by the above procedure, in no way conflicts with the local isotropy, and the internal consistency of the special relativity theory remains unchallenged.

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