Test of the isotropy of the speed of light using fast-beam laser spectroscopy
Abstract
We report on a novel experiment sensitive to the anisotropy of the one-way speed of light. The frequency of a two-photon transition in a fast atomic beam is compared to the frequency of a stationary absorber while the direction of the fast beam is rotated relative to the fixed stars. The experiment yields an improved upper limit for the anisotropy: Δc/c<=3×10-9. .AE
- Publication:
-
Physical Review Letters
- Pub Date:
- January 1988
- DOI:
- 10.1103/PhysRevLett.60.81
- Bibcode:
- 1988PhRvL..60...81R
- Keywords:
-
- Isotropy;
- Laser Spectroscopy;
- Light Speed;
- Multiphoton Absorption;
- Stellar Radiation;
- Resonant Frequencies;
- Tunable Lasers;
- Instrumentation and Photography;
- 03.30.+p;
- Special relativity