**gravity**

This book presents a local-ether wave equation for electromagnetic and matter waves. From this wave equation, a time evolution equation is derived, which represents modifications of Schrodinger's equation. From this modified equation, an electromagnetic force law is derived, which represents modifications of the Lorentz force law. From the modified force law, relationships between electric and magnetic fields are derived, which represent modifications of Maxwell's equations. By refining the wave equation with a gravitational potential, the gravitational force and the mass are derived. Moreover, numerous consequences of the wave equation can account for a wide variety of important experiments in modern physics, the special relativity, and the general relativity. Thereby, the local-ether wave equation unifies quantum mechanics, electromagnetics, and gravitation.

The theory of Quantum Electromagnetics presents a wave equation which is constructed, in compliance with Galilean transformations, for electromagnetic and matter waves. A fundamental feature entirely different from the principle of relativity is that the wave equation is referred specifically to the proposed local-ether frame. For electromagnetic wave, the local-ether wave equation accounts for a wide variety of experiments on propagation and interference. For matter wave, the wave equation leads to modifications of Schrodinger's equation which in turn lead to a unified quantum theory of electromagnetic and gravitational forces in conjunction with the origin and the identity of inertial and gravitational mass. Further, it leads to modifications of the Lorentz force law and of Maxwell's equations. Moreover, the wave equation leads to the dispersion of matter wave, from which the speed-dependence in the mass of a particle and in the wavelength, angular frequency, and quantum energy of a matter wave can be derived. The consequences of the wave equation are in accord with a wide variety of experiments that are commonly ascribed to the special relativity, the general relativity, the Lorentz mass-variation law, or to the de Broglie matter wave. Thereby, the local-ether wave equation unifies quantum mechanics, electromagnetics, and gravitation.