Electromagnetic Radiation in Strong Gravity Field

[tmhen]

TL;DR

Electric and magnetic fields of electromagnetic radiation in intense gravity.

Does the electric and magnetic fields of electromagnetic radiation remain perpendicular in the presence of an intense gravity field? If not, what is the physical ramifications of this?

 

[PeroK]

Summary:: Electric and magnetic fields of electromagnetic radiation in intense gravity.

Does the electric and magnetic fields of electromagnetic radiation remain perpendicular in the presence of an intense gravity field? If not, what is the physical ramifications of this?

The local behaviour of light in curved spacetime is the same as in flat spacetime (no gravity). A local observer measuring the local EM fields would get the same results as expected classically.

For example, in curved spacetime the local speed of light is $c$.

The only exception is where the curvature of spacetime is significant on a quantum mechanical scale. For that case you would have to model light as a quantum field phenomenon, rather than classical EM waves.