Title: history of TV

Essay Details

Subject: Technology
Author: Kimberly F
Date: June 28, 2015
Level:
Grade: A
Length: 3 / 697
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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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