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Before the discovery of electromagnetic waves and the development of radio communication, there were many wireless telegraph systems proposed and tested. [4] In April 1872 William Henry Ward received U.S. patent 126,356 for a wireless telegraphy system where he theorized that convection currents in the atmosphere could carry signals like a telegraph wire. [5]
Only Mark gives healing commands of Jesus in the (presumably original) Aramaic: Talitha koum, [104] Ephphatha. [105] See Aramaic of Jesus. Only place in the New Testament where Jesus is referred to as "the son of Mary". [106] Mark is the only gospel where Jesus himself is called a carpenter; [106] in Matthew he is called a carpenter's son. [107]
The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy". Later radio history increasingly involves matters of broadcasting.
1920s: Radio was first used to transmit pictures visible as television. 1926: Official Egyptian decree to regulate radio transmission stations and radio receivers. [40] Early 1930s: Single sideband (SSB) and frequency modulation (FM) were invented by amateur radio operators. By 1940, they were established commercial modes.
The unique feature of this transmitter is that it includes Marconi's invention of a monopole antenna. Marconi found that by connecting one side of the transmitter to an elevated copper sheet "capacity area" (top) and the other side to ground (earth), he could transmit longer distances than when using the previous dipole antennas invented by Hertz.
Archie Frederick Collins (January 8, 1869 – January 3, 1952), who generally went by A. Frederick Collins, was a prominent early American experimenter in wireless telephony and prolific author of books and articles covering a wide range of scientific and technical subjects.
Invention and Innovation in the Radio Industry (The Macmillan Company, 1949). McCourt; Tom. Conflicting Communication Interests in America: The Case of National Public Radio (Praeger Publishers, 1999) online Archived 2019-12-03 at the Wayback Machine; Meyers, Cynthia B. A Word from Our Sponsor: Admen, Advertising, and the Golden Age of Radio (2014)
The word radio is derived from the Latin word radius, meaning "spoke of a wheel, beam of light, ray".It was first applied to communications in 1881 when, at the suggestion of French scientist Ernest Mercadier [], Alexander Graham Bell adopted radiophone (meaning "radiated sound") as an alternate name for his photophone optical transmission system.