Test 3: Optical Resonator

Links: Wikipedia; Eisele et al; Herrmann et al

Experiments by optical resonators (Maser, Laser) were done to verify the "Null result" of the MM-Experiment by extreme high accuracy. Null result means that the light speed is not depending on direction (= isotropy of light speed).

The latest results have been published 2007 by Eisele and Herrmann.

Result: The maximum value of  the ratio difference in frequencies in different directions to frequency  is 10 exp -17.

Question 3: What can be concluded by this result?

Choice of possible answers:

A) Resonator experiments verified the null result of MM experiment with such a high accuracy that it has to be accepted.

B) Null result of MM experiment is still questionable

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