Planck’s constant h is a fundamental physical constant defined in the realm of quantum theoryת is determined only by physical measurement and cannot be calculated. To his day, physicists do not have a convincing explanation for why action in microcosm is quantized or why h has a specific quantitative value.
Here, a new theory is presented based on the idea that the elementary particles are vortices of a condensed superfluid vacuum. The vortex has a conserved angular momentum that can be calculated by applying hydrodynamic laws; in this way, the numerical value of Planck’s constant can be obtained. Therefore, the Planck constant is not a fundamental constant, but a servable parameter of the elementary particle as a vortex that has constant vorticity and conserved angular momentum. This theory may offer a unique and comprehensive understanding of Planck’s constant, and open a new perspective for a theory of everything.