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On the rotation of polarization by a gravitational lens

Valerio Faraoni

astro-pharXiv:astro-ph/9211012

Abstract

It is proved that the field of a gravitational lens induces no rotation in the polarization vector of electromagnetic radiation, in agreement with the previous literature, but with a different approach. The result is generalized to the case of less conventional gravitational lenses (static cosmic strings and gravitational waves).

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