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John Logie Baird, a Scottish inventor, demonstrated the first working television system, the 'Televisor', in 1926. This electromechanical device used a spinning Nipkow disk to scan images, converting ...
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John Logie Baird, a Scottish inventor, demonstrate...

Mach bands, optical illusion. Exaggerates contrast between edges of differing shades of gray, as they contact one another.
LMY24T01_PA6NW2

Mach bands, optical illusion. Exaggerates contrast...

A black man is reading braille
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A black man is reading braille