Limits on gravity-induced depolarization of light from the white dwarf Grw+70°8247
- 22 January 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 59 (4) , 047101
- https://doi.org/10.1103/physrevd.59.047101
Abstract
We use measurements of the polarization of light from a magnetic white dwarf to impose sharp constraints on the gravity-induced birefringence of space predicted by a broad class of nonmetric gravitation theories. Since gravity-induced birefringence violates the Einstein equivalence principle, our measurements test this foundation of general relativity and other metric gravitation theories in a new setting.Keywords
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