405-line television system
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The 405-line monochrome analogue television broadcasting system was the first fully electronic television system to be used in regular broadcasting. The number of television lines influences the image resolution, or quality of the picture.
Marconi 405-line mirror TV set from 1936.
A mock-up of a 1930s EMI Emitron 405-line television camera, constructed for the 1986 BBC drama Fools on the Hill
A British Murphy 405 line TV from 1951.
General Electric 950 colour wheel television receiver, manufactured in 1946 for CBS 405-line field-sequential colour system.
Television
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Television (TV) is a telecommunication medium for transmitting moving images and sound. Additionally, the term can refer to a physical television set, rather than the medium of transmission. Television is a mass medium for advertising, entertainment, news, and sports. The medium is capable of more than "radio broadcasting", which refers to an audio signal sent to radio receivers.
Flat-screen television receivers on display for sale at a consumer electronics store in 2008
Ferdinand Braun
Vladimir Zworykin demonstrates electronic television (1929).
Manfred von Ardenne in 1933