每当夜幕降临,人们都会随手拨动电灯开关,明亮的灯光驱走了黑暗。今年是杰出的科学家爱迪生(Thomas Alva Edison)发明电灯一百周年。一百年前,一八七九年十月二十一日,他在一个玻璃球状罩内通上电流试验成功一个可以发出光来的雏形灯泡。他为了找到适用于灯泡中的灯丝,竟试验过六千多种物质,而且试验得到初步成功的灯丝是棉线,而不是现在通用的钨丝。爱迪生于一八四七年二月十一日出生在美国俄亥俄州米兰城一个劳动人民家庭。他只上了三个月 Whenever night falls, people will easily switch the light switch, bright lights drive away the darkness. This year marks the centenary of the invention of electric light by the brilliant scientist Thomas Alva Edison. Hundreds of years ago, on October 21, 1879, he successfully tested a bulb-shaped light bulb in a glass globe. In order to find a filament suitable for use in a light bulb, he experimented with more than 6,000 substances, and the initial success of the test was a cotton thread instead of the tungsten filament that is currently available. Edison was born on February 11, 1847 in a working people’s home in Milan, Ohio, United States. He only took three months