An American inventor, Thomas A. Edison invented the first workable electric lamp in 1879. In the late 1800s electric lamps began to replace gas ones.
On October 21, 1879, Edison created a lamp containing a carbonized thread for the filament. The lamp burned steadily for two days.
The first commercial installation of Edison’s lamp was made in May 1880 on the steamship Columbia. In 1881 a New York City factory was lit with Edison’s system, and the commercial success of the incandescent lamp was quickly established.
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Fact File In a modern electric light bulb, a current is passed through a very thin filament of metal that has a high resistance to the flow of electricity. The filament becomes white hot and produces light. The bulb contains an inert gas o the filament will not burn. |
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