The Collaborative International Dictionary
Electro-magnetic theory of light
Electro-magnetic \E*lec`tro-mag*net"ic\, a. Of or pertaining to electromagnetism.
Electro-magnetic engine, an engine in which the motive force is electro-magnetism.
Electro-magnetic theory of light (Physics), a theory of light which makes it consist in the rapid alternation of transient electric currents moving transversely to the direction of the ray.
Usage examples of "electro-magnetic theory of light".
Stimulated by Maxwell's mathematical conclusions, Hertz and Marconi were soon afterwards able to demonstrate those phenomena which have led on the one hand to the electro-magnetic theory of light, and on the other to the practical achievements of wireless communication.