2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92448The quantization of the electromagnetic field in vacuum is presented without reference to lagrangean quantum field theory. The equal time commutators of the fields are calculated from basic principles. A physical discussion of the commutators suggest that the electromagnetic fields are macroscopic emergent properties of more fundamental physical system: the photons.Quantum Physicstext