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有学生问:为什么照相机的镜头呈紫色? 这要从科学家泰勒说起。1892年的一天,泰勒用一台照相机拍照,拍完后才发现,镜头上有一层污膜而失去了光泽。于是,他只好把镜头擦拭干净,重拍一张。照片洗出以后却发现,用脏镜头拍出的照片反倒清晰得多。这使他惊异不已,一连问了几个人,都不知为什么,这件事像谜一样留了下来。 40年后,这件事引起了另一位科学家鲍尔的注意,他反复做了多次实验发现:薄膜能增加某种光的透光性。
Some students asked: Why the lens of the camera was purple? It must be said from the scientist Taylor. One day in 1892, Taylor took a picture with a camera and found that the lens had a fouling film and lost its luster. So, he had to wipe the lens, remake one. After the photo was washed out, it was found that the photograph taken with the dirty lens was much clearer. This astonished him, asked a few people in a row, do not know why, this matter has remained like a mystery. Forty years later it caught the attention of another scientist, Powell, who repeated several experiments that showed that the film increased the light transmission of some kind of light.