arXiv:1101.3433hep-ph
Light bending by nonlinear electrodynamics under strong electric and magnetic field
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Abstract
We calculate the bending angles of light under the strong electric and magnetic fields by a charged black hole and a magnetized neutron star according to the nonlinear electrodynamics of Euler-Heisenberg interaction. The bending angle of light by the electric field of charged black hole is computed from geometric optics and a general formula is derived for light bending valid for any orientation of the magnetic dipole. The astronomical significance of the light bending by magnetic field of a neutron star is discussed.
On a whim I looked up whether magnets or electric fields can refract light, and while they generally can't, strong electric charges can: Edit: there's probably no way to make an electric field strong enough on the macro scale to bend light, unless it passes by a black hole or…
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