Abstract
We have carried out a modern version of the Kennedy-Thorndike experiment by searching for sidereal variations between the frequency of a laser locked to an reference line and a laser locked to the resonance frequency of a highly stable cavity. No variations were found at the level of 2×. This represents a 300-fold improvement over the original Kennedy-Thorndike experiment and allows the Lorentz transformations to be deduced entirely from experiment at an accuracy level of 70 ppm.
- Received 6 November 1989
DOI:https://doi.org/10.1103/PhysRevLett.64.1697
©1990 American Physical Society