2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/223263In this paper we derive a general expression for the emission rate of an emitter which is placed at the center of a real cavity drilled in a generic random medium. We apply our formalism to the computation of the decay rate of a single atom which seats within a small molecule embedded in a continuous medium.Quantum PhysicsOpticstext