In the course of the history of Physics there have been many instances when physics teacher commented on the physical problems of their time. In this article, author trying to take advantage of Maxwell's equations to check research about the movement of charged particles in a gravitational field by the General Theory of Relativity and check the nature of the gravitational force. Finally, we will unify the gravitational and electromagnetic fields by integration of classical electrodynamics theory, general relativity and theory of particle structure.