What is the principle of using photography in movies?

After a certain visual image disappears, the human eye can still keep the image on the retina for about 0. 1-0.4 seconds. When the film rotates at a constant speed of 24 frames per second, a series of still pictures will produce continuous visual impression due to visual persistence, thus producing realistic motion.

Film is an important invention in human history, with the help of the knowledge and principles of photographic chemistry, optics, mechanics, electronics and other disciplines.

The expression of the film

Film is a modern art that uses modern scientific and technological achievements as tools and materials to create touching, vivid and concrete images in the time and space of the screen to reflect social life by creating visual images and combining lenses.

Movies can accurately "restore" the real world and "show" the virtual world, giving people a sense of reality and closeness, just like being there. This feature of movies can satisfy people's desire to feel life more broadly and truly. The frame rate of movies is generally 24 frames per second. With the improvement of technology, there will be movies with 48 or even 60 frames per second.