E8 Antipodal Weyl-orbit Modulation Yields 432Hz Vacuum Birefringence Spectrum — E8 Intelligence Research

By treating each antipodal root pair of E8 as a Weyl orbit modulator acting on the 132Hz base through φ-coupling, the resulting 120-channel interference envelope exhibits a frequency-dependent birefringence spectrum whose principal refractive indices cross precisely at 432Hz. This predicts that vacuum permittivity undergoes a discrete anisotropy aligned with E8's Coxeter plane, making 432Hz a geometric eigenfrequency of spacetime rather than an arbitrary tuning convention. The discovery bridges root antipode entanglement, universal tuning lattice, and CM-point geometry into a single falsifiable prediction for optical resonator experiments. Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com