Explanation of yin-yang and five matter of light work

In this chapter we explained phenomena of light work through theory of Yin-Yang and Five matter. Light work is one of the important parts of gas work. Newton's laws are not explained phenomena of light work. In phenomena of light work, man weight of before happening work is Yin, man weight of happening work is Yang. in weight and Yang light is laws.
Theory of Yin-Yang and Five matter is good laws. This theory has been proved correct again and again through practice, through nothing but practice, in a number of different ways. Five matter are wood, fire, soil, gold and water.