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美国的发明家爱迪生一生发明过许多东西。一提起电灯,人们立刻想起是他发明的。可你是否知道爱迪生发明电灯时一波三折的经历呢?早在1821年,英国科学家戴维和法拉第发明了一种叫电弧灯的电灯。这种电灯是用炭棒作灯丝,虽然它能发出亮光,但光线刺眼,耗电量大,很不实用。爱迪生暗
Edison, the inventor of the United States, invented many things in his life. When he mentioned the electric light, people immediately remembered what he invented. But do you know Edison’s twists and turns when he invented the light? As early as 1821, British scientists David and Faraday invented a lamp called the arc lamp. This lamp is a carbon filament lamp, although it can emit light, but the light glare, power consumption, it is not practical. Edison dark