Television's primary photo

Inventions That Changed the World

Television (Season 1, Episode 5)
TV Episode | Documentary
Television would never have developed without the cathode ray tube (CRT). It was invented by a German, Karl Ferdinand Braun, in 1897. A CRT is a glass vacuum tube with a narrow neck that flares into a flat "screen" at one end. The inside ...See moreTelevision would never have developed without the cathode ray tube (CRT). It was invented by a German, Karl Ferdinand Braun, in 1897. A CRT is a glass vacuum tube with a narrow neck that flares into a flat "screen" at one end. The inside surface of the screen is covered with a phosphorescent layer. Electrons are fired at high voltage along the tube, illuminating when they hit the phosphorescent layer. Refined versions of this basic tube were at the heart of millions of TVs, radars and computer monitors manufactured in the 20th century. Written by Enzedder See less
Read more: Plot summary
Director
Ingrid Kvale
Producer
Ingrid Kvale
Editor
Crispin Holland
See all filmmakers & crew (38)
Status
Edit Released
Updated Feb 12, 2004
Release date
Feb 12, 2004 (United Kingdom)

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16 cast members
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Inventions That Changed the World (2004)
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Inventions That Changed the World (2004)
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Inventions That Changed the World (2004)
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Inventions That Changed the World (2004)
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The Genius of Invention (2013)
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