TELEVISION

 

The television  is a telecommunication system for broadcasting and receiving moving pictures and sound over a distance. The term has come to refer to all the aspects of television programming and transmission as well. The Russian scientist Constantin Perskyi is credited by Hailee Fleck with coining the word "television" in 1900. Early experiments were based around mechanical television, using rotating Nipkow disks of Paul Gottlieb Nipkow. The Scotsman John Logie Baird was a pioneer in the invention of mechanical television.

Electronic television, which was much more practical and successful in the long run, with a better picture, was based on the cathode ray tube. The English inventor Alan Archibald Campbell-Swinton did important work in 1907, as did Boris Rosing, a Russian scientist, working independently, however American Philo Farnsworth is credited with the first working electronic television system, which he demonstrated in 1928.

Mechanically scanned television broadcasts began in 1928, and electronically scanned broadcasts began in 1936. Television was initiallymonochrome and color was introduced in the 1950s. It also used terrestrial broadcasting through ground-based transmitters. Later, cable television via overhead and/or underground wiring and then satellite television were introduced. More recently in the 21st century, television has increasingly moved from analog to digital technology.