Measurement of Fresnel drag in moving media using a ring-resonator technique

Abstract

Measurements of the Fresnel drag in moving glass media were performed using a passive ring-resonator method. The effective drag coefficient was measured for various glass samples of different indices of refraction and dispersions. When we averaged 15 separate measurements, we obtained overall agreement with theory that was well within our ±2.8 × 10−4 measurement uncertainty, thus providing, to our knowledge, the most accurate verification of Fresnel drag thus far.