What is the name of the earliest book in my country that records the relationship between light and shadow?

In ancient my country, there were many scholars whose research results on astronomy and nature were of great significance to the development of various theories in later generations. During the Spring and Autumn Period and the Warring States Period, when a hundred schools of thought were contending, many schools of thought sprung up like mushrooms after a spring rain, producing different research results in different academic fields. Among them, Mohism is one of the schools. It has made great achievements in epistemology, logic and natural science issues. Among them, it has made a great contribution to optics, laying the foundation for today's physics. The earliest book in my country that records the relationship between light and shadow is probably the "Mo Jing", which is an important part of the ancient Chinese Mohist work "Mozi" and records 8 pieces of knowledge about geometric optics. 1. How does my country’s earliest book record the relationship between light and shadow

The earliest book in my country that records the relationship between light and shadow is the Mo Jing, which mainly explains shadow, pinhole imaging, plane mirror, convex mirror and concave imaging. Also explain the relationship between focusing and imaging. The eight articles on optics in the "Mo Jing" reflect the great achievements of physics in the Spring and Autumn Period and the Warring States Period in my country. The explanation of light and shadow in the book is very detailed. When you look at a mirror, the shadow is opposite, and no matter how big or small the mirror is, there is only one shadow. If the mirror stands there, if the shadow is small, it means that the mirror is tilted, and if the shadow is big, it means that the mirror is tilted. The mirror is straight; the size of the shadow is related to the distance of the light, and if the shadow does not change, it means that the object has not changed, etc. The record is very detailed and easy for the world to understand. 2. What role does the "Mo Jing" play in the development of optics in later generations?

The theory of "Mo Jing" is very important to the development of optics in later generations. Our theory of light and shadow developed earlier than that of the West. Western doctrine provides the basis for research. The Mo Jing can be said to be the light of enlightenment for our current optics. Moreover, the logic theory of "Mo Jing" plays an important role in the history of logic and culture in my country. It also occupies a certain position in the history of logic in the world and has modern value. "Mo Jing" is also of relatively practical significance to the practicality of modern physics.

Our country’s history and culture not only affects the development of our culture, but also promotes the development of world culture. The relationship between light and shadow has solved many problems in our real life. Based on the theory of light and shadow, we also invented shadow puppet plays, cameras and video cameras.