My understanding is that, according to quantum field theory, for two electrically charged particles to interact, it is necessary for them to exchange gauge bosons (photons). If a charged particle is dropped into a black hole, it will appear to be stuck at its horizon and increasingly redshifted. Is this particle capable of emitting a photon and engaging in an electromagnetic interaction? It seems quite difficult to shoot out a photon from so close to the horizon. Furthermore, a photon flung from outside toward the particle, in an attempt to engage it, would appear to get closer and closer but never quite reach that particle. And if mass is added to the hole, so that the horizon expands, is the particle now truly inside the hole? Then it could never emit a photon outside the hole. Are electromagnetic interactions with a charged hole basically impossible?