2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37857In this paper, the Lagrangian density for the vacuum is mainly discussed, meanwhile, the matter field, the modified Lorentz transformation relations and the reasons for the invariance of the velocity of light in the vacuum are also discussed.14pagesHigh Energy Physics - ExperimentHigh Energy Physics - Theorytext