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Ekhard Preikschat
Optics Group

Date: 2010-06-25 Time: 10:45 - 12:15 9.9 (9 years 3 months ago)

Where: Long Beach, CA, United States Venue: College of Business Administration


Dr. Ekhard Preikschat will lead a discussion concerning optical experiments based on interferometry. What do we know about light propagation? Quick review of the (1) Michelson-Morley series of experiments, (2) the rotational Sagnac Effect, (3) the Kantor experiment and repeat tests thereof, (4) the Pound and Rebka experiment showing that light is affected by gravity, (5) the MMX using high speed rotor and the Moessbauer effect, (6) more recent tests of Fritz K Preikschat using rotating corner cube reflector, and most recently (7) the MMX test done in a vertical plane by M. Grusenik. What don't we know? �The rotational Sagnac effect is real. What happens when we have linear sideways acceleration? Does the light beam get displaced sideways? If it does, is there an "aether" caused by inertial gravitational effects? �Has the "emission theory" of light propagation finally been disproven or is it still worthwhile to do a test in space using satellites? Could this be the "final, definitive test" of one of the basic postulates of the STR? �Despite the most accurate null tests, showing light propagation to be constant (to better than 1.5cm/sec) at all azimuthal angles, the aether theory keeps re-appearing. The recent experiment done by Grusenik in a vertical plane - is it an instrumental artifact or is it real? What would be most worthwhile doing? �Can one come up with a "final, definitive test" to prove or disprove the fundamental postulates of the STR? �What would such a test look like? �Would it be worthwhile doing?