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History of radio
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The history of radio had many contributors, beginning with the scientific discovery of electromagnetic radiation in the late 1800s, followed by technological development of improved devices for produc
Early pioneers of radio science and technology in the United States, including Charles Steinmetz, David Sarnoff, Irving Langmuir, and Alfred Goldsmith
Early pioneers of radio science and technology in the United States, including Charles Steinmetz, David Sarnoff, Irving Langmuir, and Alfred Goldsmith in 1921, photographed next to the antenna feed wires of the New Brunswick Marconi Station, one of the first transatlantic radio links. The photo includes Albert Einstein as a visiting guest.
Heinrich Rudolf Hertz (1856–1894) proved the existence of electromagnetic radiation.
Heinrich Rudolf Hertz (1856–1894) proved the existence of electromagnetic radiation.
British Post Office engineers inspect Guglielmo Marconi's wireless telegraphy (radio) equipment in 1897.
British Post Office engineers inspect Guglielmo Marconi's wireless telegraphy (radio) equipment in 1897.
Fessenden operating an underwater oscillator in 1915.
Fessenden operating an underwater oscillator in 1915.
Heinrich Hertz
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Heinrich Rudolf Hertz was a German physicist who first conclusively proved the existence of the electromagnetic waves proposed by James Clerk Maxwell's equations of electromagnetism.
History of radio
…proofs demonstrating that light, radio and x-rays were all types of electromagnetic waves propagating through free space. Between 1886 and 1888, Heinrich Rudolf Hertz published the results of experiments wherein he was able to transmit electromagnetic waves (radio waves) through the air, proving Maxwell's electromagnetic…
One of Hertz's radio wave receivers: a loop antenna with an adjustable spark micrometer (bottom).
One of Hertz's radio wave receivers: a loop antenna with an adjustable spark micrometer (bottom).
Memorial of Heinrich Hertz on the campus of the Karlsruhe Institute of Technology, which translates as At this site, Heinrich Hertz discovered electro
Memorial of Heinrich Hertz on the campus of the Karlsruhe Institute of Technology, which translates as At this site, Heinrich Hertz discovered electromagnetic waves in the years 1885–1889
Heinrich Hertz
Heinrich Hertz