Sagnac Experiment

The Sagnac Experiment was first conducted by French physicist Georges Sagnac in 1913. The experiment is essentially the same experiment as the Michelson-Morley Experiment, except that it is on a horizontal rotating turn-table. The results of the Sagnac Experiment show that when the table is rotated around on a horizontal axis during the experiment, the velocity of light indeed changes. This contradicts the Michelson-Morley Experiment that was designed to use the supposed movement of the earth to change position, and which showed no change in light velocity.

From a paper on the Sagnac Effect we read:

A Critical Analysis
In Theory of Relativity: A Critical Analysis (Archive) by Roberto A. Monti, the author states in the abstract:

On the subject of the Sagnac Effect the author maintains:

Malcom Bowden
The geocentrist Malcom Bowden describes the Sagnac Experiment in the following video:

Video Description:

The video author's personal views on geocentricity aside, Mr. Bowden provides an accurate description of the Sagnac Experiment and its results.