history of TV

Essay specific features

 

Issue:

Technology

 

Written by:

Derrick P

 

Date added:

March 24, 2015

 

Level:

University

 

Grade:

A

 

No of pages / words:

3 / 697

 

Was viewed:

5125 times

 

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Essay content:

But Nipkow's mechanical system could not scan and deliver a clear, live-action image. Many inventors hoped to perfect this. In 1921, a 14-year-old Mormon from Idaho named Philo Farnsworth came up with an idea. While mowing hay in rows, Philo realized an electron beam could scan a picture in horizontal lines, reproducing the image almost instantaneously...
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Philo was not the only one with this idea. At the same time, Russian immigrant Vladimir Zworykin had also designed a camera that focused an image through a lens onto an array of photoelectric cells coating the end of a tube. The electrical image formed by the cells would be scanned line-by-line by an electron beam and transmitted to a cathode-ray tube...
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