Discovery of electromagnetic waves

The discovery of electromagnetic (EM) waves was key to the development of wireless telegraphic communications. Continuing the EM induction studies begun by Michael Faraday, James Clerk Maxwell first derived the EM field equations in 1864, and also predicted the existence of EM waves. In 1887, Hertz detected the EM waves generated by electrical oscillations, and in 1888 he discovered that the speed, reflection, refraction, and polarization characteristics of EM waves are identical to those of light.

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