Edison's filament lamp (left) shown with bulb, c 1880.

Edison's filament lamp (left) shown with bulb, c 1880.
3 4 c m
40cm
actual image size: 32cm x 26cm

Description

Made by the American inventor Thomas Alva Edison (1847-1931), this 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. This lamp was presented to the Science Museum by Edison.

© Science Museum / Science & Society Picture Library

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