I am grateful for Frank Pearce for informing me almost year later (20.11. 2010) that he has carried out the Grusenick experiment again. There is small movement of the interference pattern during vertical rotation but nothing comparable to that detected by Grusenick so that the effect is very probably an artifact due to instabilities associated with the central mirror. An excellent video Vertical Michelson Morley Interferometer Experiment 11 12 2010 about Pearce's version of the experiment can be found here.
Friday, November 19, 2010
Mickelson-Morley experiment revisited again
For almost year ago I told about a variant of Mickelson Morley experiment performed by Martin Grusenick. He found that the interference pattern changed during vertical rotation. The experiment generated enthusiasm in people taking seriously the notion of aether although the explanation in terms of aether was excluded by very simple considerations. I proposed a possible explanation of the effect (assuming it is real) in terms of new gravitational physics possibly provided by TGD. The model involved one parameter whose size determined whether the effect is there or not.