ocr: Silver Shadows Monthly: AJournal of Motion Pictures History of Motion Pictures. (Part 2) The figure illustrates a strip of movie film. Notice the sprocket holes on either side of the framed images. These are still used today to keep the film from slipping as it rolls past the shutter of a movie camera or projector. As: al movie viewer, every second of film you see projected photographic on a movie This screen is optical really 24 illusion still makes - d - - - - frames. you believe you are seeing motion.