What is the principle of using photography and recording in movies?

According to the principle of visual persistence, movies use photography (and recording) to record images (and sounds) of external things on film, and through projection (sound reproduction at the same time), the moving images are projected on the screen (synchronized with sounds) by electricity to express certain contents.

Film is a continuous image picture developed by the combination of mobile photography and slide show. It is a visual and auditory modern art, and it is also a synthesis of modern technology and art that can accommodate drama, photography, painting, music, dance, writing, sculpture, architecture and other arts. According to the principle of visual persistence, the modern technology records the images (and sounds) of external things on the film by photography (and recording), and projects the moving images on the screen (and synchronizes the sounds) by projection (sound reproduction at the same time) to express certain contents.

Film is a visual and auditory art, which uses film, video tape or digital media to capture images and sounds, plus post-editing work. It is also a comprehensive modern art, just like art itself, with complex and diverse departments. There are many types of movies, and there are also many classification methods.

Movies are used to simulate the experience of exchanging ideas, stories, perceptions, feelings, beauty or atmosphere through recorded or programmed moving images and other sensory stimuli. The word "film" is the abbreviation of cinematography, which is usually used to refer to film production and film industry, as well as the resulting art forms, and is a cultural relic created by a specific culture. They reflect these cultures and then influence them. Film is regarded as an important art form, a source of mass entertainment and a powerful medium for educating citizens. The visual basis of film endows it with universal communication power.

Film has its own characteristics, which not only has the characteristics of other arts in artistic expression, but also has a means of expression beyond all other arts because it can use montage, an artistic film combination skill. Movies can be copied and shown in large quantities. With the development of modern society, movies have penetrated into all aspects of human social life and are an indispensable part of people's daily life.