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Person

Heinrich Hertz

A man with a neatly groomed beard and mustache, dressed in formal attire, sits against a dark background, exuding an air of scholarly respectability.

German physicist (1857–1894) who in 1888 produced and detected radio waves in his Karlsruhe laboratory, confirming experimentally what Maxwell had predicted theoretically — that light and radio belong to the same electromagnetic family. He found the work of no practical use and said so. The unit of frequency now bears his name, and every radio, phone, and Wi-Fi signal traces back to his bench.

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