Electromagnetism (EM or as an adjective, Electromagnetic) refers to electricity and magnetism and their interaction. Electromagnetic theory describes their behavior, Electromagnetic Radiation is Visible Light and similar radiations, making clear their relation to electricity and magnetism.
Cosmic Background Radiation (CBR)
Electromagnetic Radiation (EMR)
Magnetic Dipole Radiation
Navier-Stokes Equations (NS Equations)
Poynting Vector (S)
Theory Of Everything (TOE)