Analysis of the circular track experiment measuring the one-way speed of light

TL;DR

This paper reanalyzes a circular track experiment measuring the one-way speed of light, demonstrating that the results align with relativity and do not violate the invariance principle, unlike initial interpretations suggested.

Contribution

It provides a detailed reanalysis showing that the experimental results are consistent with relativity, clarifying misconceptions about one-way speed measurements.

Findings

Results are compatible with relativity

No violation of invariance principle detected

Reanalysis clarifies experimental interpretation

Abstract

All experiments attempting to verify the invariance of speed of light directly are based on two-way speed measurement. The challenge in one-way speed measurement, the requirement of spatially separated synchronised clocks, can be possibly circumvented by measuring the speed of light travelling in a closed path. An apparent violation of the invariance principle has been recently reported in the first experiment attempting to measure the one-way speed of light utilising this concept. This experiment is reanalysed here. It is found that the results of the experiment can be explained within the framework of relativity, without requiring any violation of the invariance principle.