ABSTRACT

In electromagnetic theory, the force on a given volume element within a dielectric is expressible in terms of the electric and magnetic fields at the surface of the volume element and the associated concept of surface stress tensor is well understood [1]. The calculation of the radiation pressure exerted on a moving interface between two media forms an interesting aspect of study in relativistic electrodynamics. Motivation for such a study arises in the context of explaining the excess of radiated power from a medium moving normal to the interface. Daly and Gruenberg [2] have considered this problem while studying the energy balance for perpendicularly polarized plane waves reflected from moving media. Later, Yeh [3] also touched upon this aspect in his investigation of the Brewster angle for a moving dielectric medium.