Phenomenological and electron-theoretical study of the electrodynamics of rotating systems

A phenomenological and electron-theoretical study of the electrodynamics of rotating systems is developed in the three-dimensional form. In the former part of the present paper, the electromagnetic field equations in an isotropic and homogeneous medium performing arbitrary accelerated motion relative to an inertial reference frame are derived from the phenomenological viewpoint, under the assumptions that the observer is at rest in the inertial or rotating reference frame and that the macroscopic properties of the material medium are not changed by the acceleration acting upon it. With the aid of the classical electron theory, the latter part of the present paper discusses the electromagnetic field equations in rotating media as viewed from the inertial or rotating frame, presenting an electron-theoretical basis for the electrodynamics of rotating media. In addition, the electromagnetic effects caused by the inertial forces accompanying the rotational motion, i.e., the centrifugal and Coriolis forces, are investigated in detail.