电灯泡是怎样发明的 英语作文

电灯泡是怎样发明的 英语作文

The invention of electric light\r\nBefore the advent of the electric light, the widespread use of lighting tools candles, kerosene or gas lamps. September 1878, Edison invented the electric light decision. He read a lot of books on electric lighting, determined to create a cheap, durable, and safe and convenient lamp. Edison made the light carefully summed up the failure of previous experience, to develop a detailed test plan。In 1879, after several experiments, Edison finally decided to make carbon wire filament. Electric light the most famous is a 19th century invention, Edison is also the most brilliant contributions to mankind.

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