Search results
Results from the WOW.Com Content Network
Guglielmo Marconi (born April 25, 1874, Bologna, Italy—died July 20, 1937, Rome) was an Italian physicist and inventor of a successful wireless telegraph, or radio (1896). In 1909 he received the Nobel Prize for Physics, which he shared with German physicist Ferdinand Braun .
The first voice and music signals heard over radio waves were transmitted in December 1906 from Brant Rock, Massachusetts (just south of Boston), when Canadian experimenter Reginald Fessenden produced about an hour of talk and music for technical observers and any radio amateurs who might be listening. Many other one-off experiments took place ...
Edwin H. Armstrong was an American inventor who laid the foundation for much of modern radio and electronic circuitry, including the regenerative and superheterodyne circuits and the frequency modulation (FM) system.
Lee de Forest was an American inventor of the Audion vacuum tube, which made possible live radio broadcasting and became the key component of all radio, telephone, radar, television, and computer systems before the invention of the transistor in 1947.
In 1891 he invented the Tesla coil, an induction coil widely used in radio technology. Tesla was from a family of Serbian origin. His father was an Orthodox priest; his mother was unschooled but highly intelligent.
This invention was the starting point for radio. Marconi was born on April 25, 1874, in Bologna, Italy. At about age 20 he became interested in radio waves. Radio waves are streams of energy that carry electric signals through the air. Marconi thought that radio waves could be used in communication.
The original “American” Morse Code invented by Samuel F.B. Morse is hardly in use today. However, International Morse Code is still used by U.S. Navy intelligence specialists, amateur radio operator afficionados who form the International Morse Code Preservation Society, and aviators who communicate abbreviated identifiers via Morse Code.
Radio technology - Wireless, Broadcasting, Communication: Early in the 19th century, Michael Faraday, an English physicist, demonstrated that an electric current can produce a local magnetic field and that the energy in this field will return to the circuit when the current is stopped or changed.
The first practical wireless radio communication system was developed in Italy by Guglielmo Marconi. Marconi built on the mathematics of physicist James Clerk Maxwell and the experiments of both Oliver Lodge and Heinrich Hertz to transmit experimental broadcasts from the lab he built in 1894 at his family’s country villa.
Many telegraphic systems have been used over the centuries, but the term is most often understood to refer to the electric telegraph, which was developed in the mid-19th century and for more than 100 years was the principal means of transmitting printed information by wire or radio wave.