Tv Shows Of The 40s
Television Before 1945 the basics In order for television to work, a moving image must be transformed into electronic pulses that can travel over a wire or through the air. This is achieved by repeatedly scanning the image in a very quick, tight zig-zag pattern. When the pulses reach your TV, they are painted onto a phosphor screen in the same zig-zag pattern. Tighter patterns can fit more lines into each scan, which produces sharper, clearer pictures. In a modern TV, one top-to-bottom scan uses 525 lines, and the scan repeats itself 60 times per second.
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Best Tv Shows Of The 40s
Best Tv Shows Of The 40s
Before the 1940s During the 1920s and 1930s, scanning was done mechanically, using either a revolving disc or a mirror-drum camera system. Mechanical television was used extensively by the BBC in England, and also by a few experimental stations in the United States. Although a scanning resolution of 240 lines was achieved, mechanical TV was too primitive to progress much beyond this point. In 1927, Philo T.