The first commercially available electric lamp

The first commercially available electric lamp

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Credit: SCIENCE PHOTO LIBRARY

Caption: First electric lamp. The first commercially available electric lamp with a light bulb. It was designed by the American inventor Thomas Alva Edison (1847-1931) and patented in 1900. Edison's design consisted of a carbonised bamboo filament contained in a vacuum within a sealed glass bulb. By passing an electric current through it, he could heat the filament until it glowed brightly. Edison had invested $50,000 and a year of his time conducting 6000 trials whilst researching a practical light bulb.

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Keywords: 1st commercial, available electric lamp, edison's, edison's lamp, edison's light bulb, electric light bulb, electrical, electricity, first, historical, history of science, lamp, light bulb, physics, technology

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