Interaction of light and shadow as a projection in the process of creating a shadow performance, a photo and a film

For many centuries, the name of one of the types of theater that exists in different forms has been recorded under the name "shadow theater". By this name, we mean many different principles of interaction between light and an object that create shadows. Since projection involves the use of light to achieve "light scenes" as well as the use of light as a tool for creating shadows, it is fair to call such a theater "theater of light and shadows." If we use the name “puppet theater”, since the puppet is the main performer in the performance, then in this case both light and shadows equally participate in their performing roles in the “light and shadow theater”. Light without shadow would not be light, and conversely, a shadow without light would not be a shadow. Their uses have evolved over time. Technological progress has also opened up great opportunities for the play of light and shadow. But the principle and essence of the function of the relationship between light and shadow did not change. Light, just like shadow, played a certain role on the screen within the framework of the plot presented in the play. Unfortunately, in theater studies there is still no professional theatrical terminology that allows you to communicate easily and understandably to all participants in the creation of such a performance. Right, professional terminology for working in the shadow theater technique is currently absent. The establishment of such a terminological system would help, first of all, to more easily define and distinguish between the varieties of shadows and light used, and also to raise this type of theater to a higher professional level.