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Radio
After its theorization in 1878 by James Clerk Maxwell, much development went into radio. Nikola Tesla performed the first public
demonstration of radio in 1893. While at this time primarily two scientists focused on developing radio technology, Guglielmo Marconi
and Nikola Tesla, Heinrich Hertz (from whose name comes the word for a unit of frequency) was the first to detect radio waves. Following him,
Oliver Lodge, Alexander Popov, and Edward Brauley developed a practical method for transmitting radio waves. After Tesla's demonstration,
many other scientists soon began development on radio soon after the demonstration. The first patent awarded for radio went to
Marconi in 1896. One year later he established the first radio station in the world on the Isle of Wight, England. Six years
after this, in 1906, Guglielo Marconi and Karl Braun were awarded The Nobel Prize in Physics for their contributions to radio. The next
notable development to radio did not come to radio until much later with the advent of Frequency Modulated (FM) radio, invented
by Edwin Armstrong in 1933.
Radio has seen many uses throughout the 20th century. It was used in many wars throughout the century (including the first and second World Wars) as a method of communication between soldiers, and later in airplanes (both military and non-military) as a method of pilot-to-pilot or pilot-to-ground communication. Radio also has classically been used to distribute many different forms of media to the public, including music, news, and other such content. Television signals are also transmitted using radio, with video as AM, and later sound as FM.
Television
The first major step in the development of the television came in 1884, with the advent of Paul Nipkow's "Electric Telescope", an electromechanical
television (of sorts). The machine was rather primative, with a resolution of only eighteen lines. In 1924, another advancement came when John
Baird demonstrated an analogue television in London. Shortly thereafter a company started by Baird broadcasted the first transatlantic television signal.
Though serving well in causing public interest in television, these early developments in television meant little, as they dealt mainly with
electromechanical television systems, which were quickly set aside with the arrival of the electronic television. In 1927 Philo Farnsworth finished
the first working electronic television, free from many of the mechanical moving parts of previous televisions.
Television began to become more and more prevalent after the development of the electronic television. RCA was the first company to begin marketing television sets for use in the home. Stations that broadcasted television signals became commonplace as television sets grew popular. Over the course of the 20th century television has become one of the primary sources for entertainment and information in the lives of millions of people around the world.
These two technologies, radio and television, have revolutionized the lives of billions of people around the world. Radio allows for those in remote areas to stay in communication with the rest of the world; television remains one of the fastest and most global ways for news to reach a great deal of people. Radio was also an important preceding technology for television; without it, television stations would not have a way to easily distribute their content. Television was also a technology that played an important role of the development of computers, a technology that did not come until much later in the 20th century. Together, television and radio have given way to a technological revolution around the world.
"Radio". Wikipedia. 29 April 2005
<http://en.wikipedia.org/wiki/Radio>
"Television". Wikipedia. 29 April 200
<http://en.wikipedia.org/wiki/Television>
"History of Television Timeline". 29 April 200
<http://inventors.about.com/library/inventors/bl_television_timeline.htm>
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