Planck’s Constant—A Bridge to Charge and Entanglement

Planck’s constant was introduced phenomenologically to fit blackbody radiation, yet its physical origin has remained unclear. In this work, an elementary fermion is modeled as two coupled real strings. The coupling generates tension within the strings, and this tension is shown to be proportional to the coupling strength through Planck’s constant. Equation (25) provides a direct interpretation: hhh emerges as the universal unit of action that characterizes the intrinsic response of coupled fields, independent of particle mass or size. This mechanical derivation grounds $h$ in first principles, rather than treating it as an empirical input. While later work extends this framework to electric charge and entanglement through Noether symmetry and internal phase correlations, the present paper is restricted to establishing the physical basis of Planck’s constant.