Master Equation – Parent 2 – v1.2.1 Non-Geometric Interpretation of Mercury's Perihelion Precession within the MyominAung Photon-Sea

This paper provides a focused consistency demonstration showing that Mercury’s anomalous perihelion precession—traditionally regarded as a hallmark confirmation of General Relativity—can be reproduced within the MyominAung Photon-Sea Theory (MATE) without invoking spacetime curvature as a fundamental mechanism.Within the MATE framework, gravitational phenomena arise from gradients in a universal photon-sea field characterized by frequency-dependent refractive properties. Mercury’s observed perihelion advance is interpreted as a cumulative phase and trajectory shift induced by spatial gradients in the effective refractive index of this medium near the Sun.The analysis does not dispute the empirical success of General Relativity. Instead, it demonstrates that relativistic corrections can admit a non-geometric, field-based interpretation that is numerically consistent with observations. No Mercury-specific parameter fitting is introduced beyond established solar and orbital scales.This work serves as a subsidiary validation study supporting the broader master-equation formulation of MATE, and is intended to be read as a phenomenological supplement rather than a replacement for geometric gravity theories.