who was humphrey davey? Who firstly invented the light bulb ??
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Sir Humphrey Davy
Light Bulb
The electric light bulb is a glass bulb fitted with a wire filament, which glows when heated by electricity. Thomas Alva Edison invented the first practical electric bulb in 1879.
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Invention of the Light Bulb: Davy, Swan and Edison - EnchantedLearning.com. The first electric light was made in 1800 by Humphry Davy, an English scientist. He experimented with electricity and invented an electric battery.