Closed Surface Gravitational Medium Theory: Gravitational Permittivity and Semi-Conductive Behavior

This paper introduces the concept of gravitational permittivity () as an analogue to electric permittivity, redefining gravity as a medium-dependent field rather than a universal constant.In this framework, the transmission of gravitational influence depends on the structural properties of the intervening medium between two masses.Solid materials, having low , efficiently transmit gravitational stress, while gases or vacuum, with high , act as gravitational insulators.This leads to the definition of gravitational semiconductors, materials that partially transmit and partially buffer gravitational forces.Within Closed Surface Theory, the relation c= 1/ connects gravitational and electromagnetic constants, unifying the propagation of energy through the geometry of space.The study proposes that the apparent constancy of light speed emerges as the limiting case of infinite gravitational permittivity in vacuum, thereby extending the idea of field interaction to the orthogonal structure of space-time surfaces.