Part 1 of Essay
(sin-uh-muh-tahg'-ruh-fee) Cinematography is the technique and art of making motion pictures, which are a sequence of photographs of a single subject that are taken over time and then projected in the same sequence to create an illusion of motion. Each image of a moving object is slightly different from the preceding one. ....

Part 2 of Essay
.... of the viewer to retain or in some way remember the impression of an image after it has been withdrawn from view. The critical flicker frequency is the minimum rate of interruption of the projected light beam that will not cause the motion picture to appear to flicker. A frequency above about 48 interruptions a second will eliminate flicker. Camera Like a still camera (see CAMERA), a movie camera shoots each picture individually. The movie camera, however, must also move the film precisely and control the s ....