The Gravitational and Electromagnetic Field

We introduce the concept of equivalent electromagnetic (EEM) field, on the basis of which we describe the gravitational field (G-field). We determine this EEM field based on the principle of equivalence (PE), i.e. by direct application of PE in the field equations and in the equations of motion, by introducing the EEM field potential. In this way, we introduce the mathematical formalism of the electromagnetic (EM) field into the G-field equations. This procedure of describing the G-field has a limitation and can be applied to static, stationary and quasi-stationary fields. Obtained equations and solutions are compared with the General Theory of Relativity and the differences are analyzed.