TL;DR
The paper clarifies Selleri's paradox by showing it results from a different synchronization scheme, and demonstrates how Einstein synchronization resolves the apparent contradiction with special relativity.
Contribution
It explains how Selleri's paradox arises from alternative synchronization choices and confirms that Einstein synchronization maintains isotropic light speed in inertial frames.
Findings
Selleri's paradox is due to non-Einstein synchronization.
Using Einstein synchronization resolves the paradox.
Anisotropic light speeds do not contradict relativity.
Abstract
Selleri's paradox, based on an analysis of rotating frames, appears to show that the speed of light in an inertial system is not normally isotropic. This in turn seems at odds with the second postulate of special relativity requiring a universal light speed in inertial systems. First, it is demonstrated how to circumvent Selleri's argument using Einstein synchronization in rotating frames. Then the nature of Selleri's result is exposed: it simply corresponds to the adoption of a synchronization procedure different from Einstein's. In this scheme, anisotropic one-way speeds of light by no means contradict special relativity.
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