This paper proposes a novel hydrodynamic model of photon emission based on the principles of Substratum Hydrodynamics (SH) and a dynamic interpretation of the Casimir effect. We argue that photon emission is the result of a catastrophic collapse of a nanometric cavitation void within the cosmic Substratum. In this model, the Casimir force acts as a "positive feedback" mechanism, focusing the immense background pressure of the Substratum (10³² Pa) and driving the cavity walls to trans-luminal velocities (v > c). This work synthesizes the macro-phenomenon of sonoluminescence and atomic spectral transitions into a single mechanical framework, thereby providing a deterministic physical explanation for the "quantum leap." The derivation suggests that Planck's constant (h) represents a fundamental hydrodynamic action of the Substratum's cavitation collapse.
Vakhtang Mchedlishvili (Fri,) studied this question.