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17世纪的时候,欧洲就有人利用光把人影投到暗箱的玻璃上,照着玻璃上的影子画下来。也在这个时候,人们在炼金的过程中发现了银的化合物,它见光后就会慢慢变色,但一直未被人重视。到了19世纪,法国人达盖尔想到银的特性,便把银板放在暗箱里,试着照相。拍完后,达盖尔拿出银板一看,什么影子也没有,他只好把银板放在药柜里。第二天,他打开药柜,拿出银板一看,上面却出现了影
In the 17th century, some people in Europe used light to cast their shadow on the glass of a black box and draw it down on the glass. Also at this time, people found the silver compound in the process of alchemy, it will slowly change color after seeing the light, but it has not been taken seriously. By the 19th century, when French Duguer thought about the characteristics of silver, he put the silver plate in the dark box and tried to take pictures. After the shoot, Dagel came up with a silver plate, what shadow did not, he had to put the silver plate in the medicine cabinet. The next day, he opened the medicine cabinet, took out the silver plate and saw it above, but there was a shadow