Edison's filament lamp, 1879.
4 0 c m
actual image size: 25cm x 32cm

Edison's filament lamp, 1879.

© Science Museum / Science & Society Picture Library


Made by the American inventor Thomas Alva Edison (1847-1931). Edison's lamp had a single loop of carbon which glowed when a current flowed through it. The glas bulb contained a partial vacuum; there was so little oxygen in the bulb that the filament could get very hot without catching fire.

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