  We study the propagation of electromagnetic (EM) waves in extremely dense
exotic systems with very unique properties. These EM waves develop a
longitudinal component due to interactions with the medium. Renormalization
scheme of QED is used to understand the propagation of EM waves in both
longitudinal and transverse directions. The propagation of EM waves in a
quantum statistically treatable medium affects the properties of the medium
itself. The electric permittivity and the magnetic permeability of the medium
are modified and influence the related behavior of the medium. All the
electromagnetic properties of a medium become a function of temperature and
chemical potential of the medium. We study in detail the modifications of
electric permittivity and magnetic permeability and other related properties of
a medium in the superdense stellar objects.
