1. The history of the mirror We call a piece of polished metal or silver-backed glass a mirror. The incredible thing is that although it is just an ordinary physical reflector, its function is only to compress a three-dimensional space into a two-dimensional plane. The strange thing is that it tempt...
1. The origin of the mirror The mirror is an indispensable tool for people's daily life to look at the face and face. It has been popular for thousands of years. From the ancient times, it only used (jian) water to look at the face. Due to the inconvenience of use, it was later developed into cast b...
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