HISTORY OF ELECTRONIC MEDIA  

Television

Television technology was actually first developed in the 19th century, before commercial radio was conceived of, when in 1897, Ferdinand Braun invented the cathode ray tube. The first time the cathode ray tube was used to produce images was in 1907. As early as 1876, Boston civil servant George Carey envisioned complete television systems, putting forward drawings for a “selenium camera” that would enable people to “see by electricity” a year later (Federal Communications Commission, 2005).

Timeline of Events in Television Publishing

1920s	First mechanical televisions used a rotating disk with holes by John Logie Baird & Charles Francis Jenkins
1927	First television was created by  21 years old by Philo Taylor Farnsworth. America’s first commercially produced television
1948- 1955	The world’s first television remote control was called “Tele Zoom” and The first “true” remote control was produced by Zenith
1963-1989	Television surpasses newspapers as an information source . NBC calls itself the full color network and Pay Per View begin to leave its mark on television
1996	Digital satellite dishes 18 inches in diameter hit the market
2005- 2010	Falt screen TVs and HDTV are introduced for the first time and Sony release its Blu-ray disc format, capable of holding up to27GB despite being the same size as a DVD. 3D televisions start hitting the market

  

Telephone

A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. The essential elements of a telephone are a microphone to speak into and an earphone which reproduces the voice in a distant location. The dial may be located either on the handset or on a base unit to which the handset is connected.

                   Timeline of Events in Telephone Publishing

1794	Signaling system that connects Paris and Lilie
1838	Morse shows the electric telegraph in the United
1876	Bell invented the telephone
1893	Marconi invented telegraphy without wire
1955	Attempt communication via optical fiber
1967	Telephone without wire
1979	Cellular telephone networks in Japan

 Radio

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz and 300 gigahertz . In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location. Radio waves were first identified and studied by German physicist Heinrich Hertz in 1886.

 Timeline of Events in Radio Publishing

1888	Heinrich Hertz prove the existence of radio waves
1899	Loud speakers introduced
1901	Marconi sent radio signals
1903	Advances in radio technology
1919	Short-wave radio introduced
1952	Small transistor radio was introduced by Sony
1984	Players compact disc (CD) in the market