After 5,000 years of Chinese civilization, our ancestors created many precious cultural relics and miracles that blend art and science, culture and philosophy, such as the thousand-mile Great Wall and the thousand-year-old Goujian Sword of King Yue, which fully demonstrate the wisdom of the ancients.
The book "Common Knowledge of Chinese Cultural Relics" includes many precious cultural relics of China's past dynasties, not only tells about their excavation process, but also depicts in detail the historical background and knowledge behind the cultural relics. One of the cultural relics that has attracted great attention is the magical thing known as the "Demon Mirror".
According to the record of "Common Sense of Chinese Cultural Relics", the official name of this "demon mirror" is the "light of seeing the sun" mirror of the Western Han Dynasty, which was discovered during the second national cultural relics census in the early 80s of the last century. In order to find the national treasures lost by the people, China launched a large-scale cultural relics survey, and finally found this peculiar "light of the sun" mirror in a family.
When experts first saw the mirror, they didn't find anything special. It has a diameter of only 74 cm, just enough to hold with one hand, is not much different from the ordinary copper mirrors used by ancient people. However, according to expert research, the background of this "light of the sun" mirror is the Western Han Dynasty, which has a history of more than 2,000 years and is well preserved.
At the same time, experts noticed that there were some ornaments and inscriptions on the back of the mirror, and after interpretation, it was found that the inscription was "the light of the sun, the world is bright", which is also the reason why this bronze mirror got the name "the light of the sun". This inscription attracted the attention of experts, because the back of the bronze mirror of the Western Han Dynasty found before this was usually not cast with such a complex ornamentation, and the back of this mirror was engraved with the words "see the light of the sun, the world is bright", which obviously has its special meaning.
Experts speculate that "daylight" is the light emitted by the sun. Since the Sun is much larger than the Earth and far from the Earth, the sunlight that hits the Earth can basically be considered as parallel light, which is a fundamental property of daylight. The expert took a flashlight that was almost parallel and shone it on the copper mirror, so that it could "see the daylight". Subsequently, this copper mirror reflects the light onto the wall, acting as a mirror, which is quite normal.
However, to the surprise of the experts, the light reflected by the seemingly flat copper mirror appeared on the wall, and the inscription and ornamentation on the back were clearly revealed! This miraculous phenomenon amazed experts, because early film films were made by shining light on the film, and the picture was presented on the screen through the light and dark shadows on the film. However, this light is transmitted through film, and this "light of the sun" mirror uses reflected light to project the back decoration and text onto the front, as if the light emitted by the back of the mirror is turned into *** by the mirror, which is amazing.
After some research, the experts revealed the secrets of this special bronze mirror. It turns out that during the casting process, when the back pattern cools rapidly, the front mirror surface will have extremely subtle fluctuations and deformations. During the polishing process, this deformation causes new mirror undulations, which are micron-sized and difficult to observe with the human eye. It is these special undulations and deformations that give the "Sunlight" mirror a translucent effect, revealing the pattern on the back in the reflected light in front.
What is shocking is that the ancients were able to cast such a fine and complex bronze mirror more than 2,000 years ago, which is unbelievable. According to the description of "Common Sense of Chinese Cultural Relics", among the many bronze mirror relics in the collection of the Shanghai Museum, only 4 sides have this special casting process, and the one found in the 80s is the clearest. What is even more surprising is that this special casting process was lost in the Song Dynasty more than 1,000 years ago, and modern people cannot replicate the effect of the "light of the sun" mirror even if they are based on modern technology. This fully demonstrates the depth of the wisdom of our ancestors.
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