Inventions That Changed the World - Season 1 Episode 5 The Television
Overview: 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 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.
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1 | Apple TV 4K | Download 4K | Watch 4K | |
2 | Google Play Movies 4K | Download 4K | Watch 4K | |
3 | Fandango At Home 4K | Download 4K | Watch 4K | |
4 | Amazon Video HD | Download HD | Watch HD | |
5 | Apple TV SD | Download SD | Watch SD | |
6 | Google Play Movies SD | Download SD | Watch SD | |
7 | Fandango At Home SD | Download SD | Watch SD |