The theoretical implications of electromagnetism, particularly the establishment of the speed of light based on properties of the "medium" of propagation (permeability and permittivity), led to the development of special relativity by Albert Einstein in 1905.
As implicacións teóricas do electromagnetismo, en particular a determinación da velocidade da luz baseándose nas propiedades do «medio» de propagación (permeabilidade e permitividade), conduciron ó desenvolvemento da relatividade especial por Albert Einstein en 1905.