We derive the wave equation obeyed by electromagnetic fields in curved space-time. We find that there are Riemann and Ricci curvature coupling terms to the photon polarisation which result in aâ€¦ (More)

Considering the definition of inertial forces acting on a test particle, following non-circular geodesics, in static and stationary space times we show that the centrifugal force reversal occurs onlyâ€¦ (More)

We derive the wave equation obeyed by electromagnetic fields in curved spacetime. We find that there are Riemann and Ricci curvature coupling terms to the photon polarisation which result in aâ€¦ (More)

Using the optical reference geometry approach, we have derived in the following, a general expression for the ellipticity of a slowly rotating fluid configuration using Newtonian force balanceâ€¦ (More)

Einstein's theory predicts that, massive test particles with non-zero spin or angular momentum, in an external gravitation field, follow geodesics which depend upon the orientation of theâ€¦ (More)

We study the observational consequences of the leading order P and T violating gauge invariant graviton-photon interactions. Such interactions give rise to gravitational birefringence-the velocity ofâ€¦ (More)

We review the WKB method for multicomponent fields obeying hyperbolic linear partial differential equations and derive a general necessary and sufficient condition for the formalism to provideâ€¦ (More)

Using the generalised set of fluid equations that include the â€˜Coriolis forceâ€™ along with the centrifugal and pressure gradient forces, we have reanalysed the class of self similar solutions, withâ€¦ (More)

The Cumulative Drag Index defined recently by Prasanna [1] has been generalised to include the centrifugal acceleration. We have studied the behaviour of the drag index in the Kerr metric as well asâ€¦ (More)

We consider here the structure of rotating compact objects endowed with a magnetic field in general relativity as models of pulsars. We discuss first the structure of rotating stars in the frameworkâ€¦ (More)