Using the Uncharged Kerr Black Hole as a Gravitational Mirror - General Relativity and Gravitation
- ️Cramer, Claes R.
- ️Tue Apr 01 1997
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Abstract
We extend the study of the possible use of the Schwarzschild black hole as a gravitational mirror to the more general case of an uncharged Kerr black hole. We use the null geodesic equation in the equatorial plane to prove a theorem concerning the conditions the impact parameter has to satisfy if boomerang photons are to exist. We derive an equation for these boomerang photons and an equation for the emission angle. Finally, the radial null geodesic equation is integrated numerically in order to illustrate boomerang photons.
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Authors
- Claes R. Cramer
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Cramer, C.R. Using the Uncharged Kerr Black Hole as a Gravitational Mirror. General Relativity and Gravitation 29, 445–454 (1997). https://doi.org/10.1023/A:1018878515046
Issue Date: April 1997
DOI: https://doi.org/10.1023/A:1018878515046