世界上有许多发明就像搭积木一样,你搭一块,我垒一块,最后才搭成功一幢完美的大厦。电视机的发明,也是这样一个过程。 那是在1873年,英国有一位叫史密斯的电气工程师,他在一次实验中发现了一个奇怪的现象。一种不良导体“硒”,当受到光照射时,竟能像电池一样产生出电来;而遮住射向硒的光线时,电就没有了。 史密斯的报告发表后,引起各国科学家的兴趣。人们原先只知道电池和发电机能发电,现在怎么光又能发出电来呢?美国有位工程师,他将一块硒夹在两块金属板中间,放在阳光下作试验,果真从金属板上得到了微弱的电流,就像一个光生伏打电池一样。于是,这位科学家把这个装置叫做“光电池”。 There are many inventions in the world like building blocks, you take a block, I base a block, and finally take a successful building a perfect. The invention of the television is also such a process. That was in 1873, when a British electrician named Smith, who discovered an odd phenomenon in an experiment. A poor conductor of “selenium,” when exposed to light, can actually generate electricity as a battery; and cover the light that goes to selenium, the electricity is gone. After the publication of Smith’s report, it attracted the interest of scientists from all over the world. People originally only know that the battery and generator can generate electricity, how light can send electricity now? An engineer in the United States, he will be a piece of selenium sandwiched between two metal plates, placed in the sun for a test, really from the metal plate The weak current, like a photovoltaic cell. So, the scientist called the device “photovoltaic cells.”