The Secret Life of Machines: The Electric Light”

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The Secret Life of Machines: The Electric Light”
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From: silichip
Videos: 1981
Added: 27-10-2011 00:32:08
Classic: S03E04 (1993) - A Scottish chemist called Joseph Swann tried passing electricity through fine wires (filaments) to make them glow white hot in 1860. Despite enclosing them in bulbs and pumping out the air, they quickly broke or blackened and Swann abandoned the idea. 17 years later, finding a better vacuum pump, he tried again. With no air left inside, the filament light bulb became a practical proposition.
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