Title: Measurable Experimental Difference between Relativity and FitzGerald-Lorentz length contraction
Abstract: We describe an experimental setup sensible to the fundamental difference between STR and LF-contraction theories: the existence of a privileged frame of reference where light's speed is isotropic and equal to 'c'. The setup consists of a one-way interferometer (no mirrors reflecting the light back over the same path), with no moving parts and at rest in the laboratory. If this fundamental preferred frame exists then, if the laboratory moves with respect such a frame, a fringe displacement should be observed when the interferometer's orientation is changed with respect to this velocity. Importantly, this fringe shift is only apparent to the observer, as the phase difference between beams remains always constant (as expected) during the rotation. It is also shown why a Michelson-Morley interferometer (or any two-way interferometer) is incapable of measuring the effect.