Abstract

Recently we have presented a theory of unification of gravitational and electromagnetic fields based on the generalization of Newton’s law to include a dynamic term similar to the Lorentz force of electrodynamics[1]. The unification is convincing. The generalization based on similarity of Newton’s law and Coulomb’s law, however, is speculative although reasonable and compelling. In this article, we have presented a derivation of the dynamic term of gravitation based on our newly proposed ether dynamics, which removes the speculative nature of dynamic term and perfects the unification theory. It turns out that the gravitational interaction is transmitted through the space medium ether. An object in ether is in direct contact with the ether, causing it to move like a highly viscous and incompressible fluid. The movement of ether propagates thorough space like a continuous medium, exerting a force on any object in ether. Not only neutral objects can disturb the fluid ether, the charged objects can also disturb the ether as well. Applying the fluid dynamics of ether on charged particles, we have derived the empirical Biot-Savart law and Lorentz force of electrodynamics. The significance of theoretic derivation of these empirical and fundamental laws is similar to the derivation of the empirical Kepler’s laws by Newton’s theory of gravitation. It turns out that a moving charged particle would disturb the fluid ether. The disturbance spreads into the space as a continuous medium, causing local vorticity. The magnetic field is linearly proportional to the local vorticity of ether, exerting a force on another moving particle in space. The vorticity of ether is responsible for the dynamic gravitation and Lorentz force of electrodynamics. The Ether Dynamics consummates our theory of unification of gravitational and electromagnetic forces.