who invented bulb and why
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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. When he connected wires to his battery and a piece of carbon, the carbon glowed, producing light.
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Thomas Edison
Thomas Edison and the “first” light bulb
In 1878, Thomas Edison began serious research into developing a practical incandescent lamp
Explanation:
to light the earth
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