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) its author Dr. Roberto Monti (bio) describes in the abstract:

On the subject of the Sagnac Effect, Dr. Monti states:

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.

General Relativity Framework
On the assertion that the Sagnac Effect is explained under the framework of General Relativity theory, Professor Ramzi Suleiman of the University of Haifa writes the following:

The Sagnac Effect Falsifies Special Relativity Theory (Archive)