FOR POSTING: UFT422 Sections 1 and 2 and Background Notes

This short paper gives an experimental method of measuring m ( r ) with a high sensitivity Sagnac interferometer which can be bought of the shelf or built in the lab with many turns of a thin optical fibre to maximize the area. It gives a simple method of measuring m ( r) experimentally, and gives a test the Einstein equivalence principle and the idea of a null geodesic. It also gives a test of the obsolete Schwarzschild metric and of the frame rotation idea used in de Sitter and Thomas precession. According to EGR the m function (19) should depend on the radius of a platform placed in the Earth’s gravitational field. The Schwarzschild radius of the earth is 2MG / c squared = 0.09 metres. So to test EGR a Sagnac interferometer with a given radius r is needed. Changing the radius r should change the Sagnac interferogram according to Eqs. (16) and (19). This should be an easily detectable change in the Sagnac interferogram. I do not think that any such change has ever been observed, and for Sagnac interferometry on the earth’s surface, m ( r ) is almost certainly close to one and its exact dependence on r can be found experimentally with a very accurate Sagnac interferometer. The EGR theory fails completely yet again. If the Sagnac interferometer is tested in zero gravity conditions on board a spacecraft, or in a high altitude aircraft, it would give an idea of the effect of gravity on m ( r ). The Sagnac interferometer could be smuggled on to the aircraft through customs (in humour).



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