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Evolution of Light Bulb (comparison)

The first incandescent light was invented back in 1800 by a Cornish chemist and inventor named Humphry Davy. He managed to create a battery that was wired to a piece of carbon, thus producing a carbon-lit light. This technique is called the electric arc. However, most people consider that the electric light was invented by two people: Thomas Edison from the USA and Sir Joseph Wilson Swan from England. The fluorescent bulb first appeared around...