The black hole as a gravitational ``lens''

Details The black hole as a gravitational ``lens'' The black hole as a gravitational ``lens''

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987amjph..55..428o&link_type=abstract

American Journal of Physics, Volume 55, Issue 5, pp. 428-432 (1987).

Physics

49

Black Holes, Relativity And Gravitation

Scientific paper

We discuss the ``images'' formed when the light from a distant source suffers a large deflection in the intense gravitational field in the immediate vicinity of a Schwarzschild black hole. The light can circle around the black hole one or several times, and therefore give rise to a sequence of images. We show that the deflection angles and the intensities of the images can be expressed in terms of elliptic integrals, leading to simple approximations in the limiting case of very large deflection angles.

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