Circular Time Delay around a Rotating and Nonrotating Mass

We make some considerations regarding the time delay of two light signals around a closed line, the well-known Sagnac effect. In our opinion, this experiment in flat space-time is simply a further test of Einstein's equivalence principle. The revolving observer is physically equivalent to an observer at rest in a Lense-Thirring-like geometry.

Automated summary

The passage discusses the time delay of two light signals in a closed loop, known as the Sagnac effect, and presents it as a further test of Einstein's equivalence principle, suggesting that a rotating observer is physically equivalent to an observer at rest in a Lense-Thirring-like geometry.