RADIATION-FIELDS OF A DIPOLE IN ARBITRARY MOTION

We present a version of Jefimenko's formulas for electric and magnetic fields in material media, and we demonstrate how this version of the formulas may be used for deriving the electric and magnetic fields pro duced by an arbitrarily moving dipole containing both electric and mag netic moments. Like the fields produced by a charge in arbitrary motio n, the fields of an arbitrarily moving dipole can also be written in t wo forms: The Heaviside-Feynman form and the Lienard-Wiechert form. We derive here the first form and the radiation fields associated with t he second form. These radiation fields are expressed by means of conci se, symmetric, and illuminating formulas.