General Relativistic Equation of Motion for a Photon Moving Round a Time Varying Spherical Distribution of Mass

W. L. Lumbi, I. I. Ewa


In this article, Schwarzschild metric is extended to obtain a generalized metric for the gravitational field exterior to time varying spherical distributions of mass. Einstein’s equation for photon moving round a time varying spherical distribution of mass is derived. The second-order differential equation obtained is a modification of the equation of motion in Schwarzschild field. It introduces a unique dependence of the motion of the photon in this field on Newton’s scalar potential exterior to time varying spherical bodies.


General relativity; Photon motion; Time varying; Spherical body; Schwarzschild metric

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