I haven't studied this very much, but how do EM waves behave in noninertial frames? Do photons have an acceleration in order to maintain constant speed c in the noninertial frame? What happens to the Lorrent'z force in non-inertia frames? A charge moving in a magnetic field is equal to a magnetic field moving across a charge from an inertial observer; the velocity vector is relative. But what if a magnetic field source is accelerating across a charge? Anyone got a good read on this, or can type up an explanation?