Heinrich Hertz was a German Physicist he showed experimental evidence of Electromagnetic Waves and their link to light. He also proved the existence of radio waves in the late 1880s.
Electromagnetic Wave Theory
James Clerk Maxwell was a Scottish Scientist he formulate the classical theory of Electromagnetic radiation bringing together for the first time electricity, magnetism, and light.
Electromagnetic Wave Theory
Michael Faraday who contributed principles to electromagnetic induction and Hans Christian Oersted who discovered that the electric current in a wire can deflect magnetized compass needle.