Sign In
We'll never share your email with anyone else.
Reset Password

Enter your email address and we'll send you a link to reset your password.

Back to Sign In

Inventions That Changed the World Miniseries Episode 5 The Television 2004

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.

Download : MKV
Download : MP4

Similars

Recommendations