Physics
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003gregr..35.1775k&link_type=abstract
General Relativity and Gravitation, v. 35, Issue 10, p. 1775-1784 (2003).
Physics
11
Scientific paper
In this article, we first investigate the bending of light rays in 4D line elements representing spherically symmetric, static on-brane geometries. The amount of bending in these four dimensional, strong and weak field solutions is derived. Signatures, which appear in the bending formulae, due to the presence of extra dimensions are discussed. Subsequently, as a separate exercise, we calculate the bending of null geodesic trajectories in a bulk five dimensional spacetime with a Schwarzschild line element on the 3-brane section. We interpret the deviation of null trajectories as that of gravitational signals or five dimensional `photons,' which are, unlike light rays confined to four dimensions, allowed to propagate along the fifth (extra) dimension. Features of the presence of extra dimensions in the effective potentials and the bending formula are analysed in this context.
Kar Sayan
Sinha Manodeep
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