2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147775We claim that the existence of a mechanism such that photons may be trapped in a compact domain is not an exclusive property of gravitational forces. We show the case in which a non-linear electrodynamics allows such effect. In this latter case we should call this region an Electromagnetic Black Hole (EBH).11 pages, LaTex, no figures, revised versionGeneral Relativity and Quantum Cosmologytext