Absolute Cosmology 05:The Definitive Test of the Modified Michelson-Morley Experiment

This paper constitutes the fifth installment of the Absolute Cosmology series. Building upon the absolute spacetime axioms, photon reference frame, and absolute cosmic transformation equations established in the first four papers, this work focuses on the first definitive empirical test of the theoretical system—the modified Michelson-Morley (MM) experiment. Addressing the inherent symmetry defect of the traditional MM experiment, where the "rigid co-motion of light source and interferometer" leads to a null result, this paper designs a modified scheme that artificially introduces a non-co-moving relative velocity , predicting a non-null fringe shift of Confronting the challenge of detecting such a minute signal ( fringes), we establish a comprehensive system error budget model. We demonstrate that standard optical engineeringtechniques—including Invar alloy bases, active vibration isolation, iodine-stabilized lasers, and high-vacuum environments—can suppress the total systematic error to fringes, achieving a signal-to-noise ratio exceeding 10:1. Furthermore, we outline a three-tier implementation roadmap: desktop verification, ground-based precision, and space-borne payload, with detailed cost estimates ranging from 0.8 million to 1 billion CNY. We also identify capable institutions, such as the Institute of Mechanics, CAS, and Zhejiang University. This experiment is highly feasible; its outcome offers a definitive test of the "constancy of light speed" postulate. A non-null result would confirm that the speed of light is constant relative to its emission point, potentially shifting physics from the relativistic paradigm back to an absolute spacetime framework. Conversely, a strictly null result would falsify Absolute Cosmology. Adhering to the Occam's Razor patch-free paradigm, this study provides a practical empiricalpathway to resolve the century-long logical debate regarding the nature of space and time.