|image = Heinrich Rudolf Hertz.jpg
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|signature = Autograph of Heinrich Hertz.png
'''Heinrich Rudolf Hertz''' (February 22, 1857 – January 1, 1894) was a [[German people|German]] [[physicist]] who clarified and expanded the [[electromagnetic theory of light]] that had been put forth by [[James Clerk Maxwell|Maxwell]]. He was the first to conclusively prove<ref name="electrician1899">''Prof. [[David Edward Hughes | D. E. Hughes]]' Research in Wireless Telegraphy'', [[The Electrician]], [http://books.google.com/books?id=xWpNAAAAYAAJ Volume 43], 1899, pages 35, [http://www.physics.princeton.edu/~trothman/electrician.pdf 40-41], 93, 143-144, 167, 217, 401, 403, 767. [[Elihu Thomson]] recognized the Hughes claim to be the first to transmit radio. Hughes himself said "with characteristic modesty" that Hertz's experiments were "''far more conclusive than mine''", and that Marconi's "''efforts at demonstration merit the success he has received''...[and] ''the world will be right in placing his name on the highest pinnacle, in relation to aerial electric telegraphy''".</ref> the existence of [[electromagnetic waves]] by [[engineering]] instruments to transmit and receive [[radio]] pulses using [[Scientific method | experimental procedures]] that [[Deductive reasoning | ruled out]] all other known wireless phenomena.