Discovered electromagnetic waves using four equations of electromagnetism
James Clark Maxwell
Mathematically predicted the existence of electromagnetic wave
James Clark Maxwell
Calculated the speed of electromagnetic waves
James Clark Maxwell
Matched the speed of light
James Clark Maxwell
Experimentally proved EM waves when he discovered how to make radio waves
Heinrich Hertz
Measured the speed, verified the electromagnetic wave discovery
Heinrich Hertz
Pioneered the usage of radio waves in wireless telegraphy
Guglielmo Marconi