A Unified Deterministic Geometric Framework for Electromagnetic Radiation-Matter Interactions

The present work introduces a unified phenomenological framework for radiation-matter interactions grounded in the deterministic kinematics of a continuous elastic vacuum medium. By redefining the photon as a unitary bidirectional field event rather than an independent wave packet, the model systematically resolves the historical localization paradox without introducing free parameters or altering the predictive outcomes of Quantum Electrodynamics (QED). The three canonical interaction regimes—t