Film is projected with a shutter operating at twice the frame rate or better, to minimize flicker. It would be unwatchable otherwise. See http://en.wikipedia.or

Film is projected with a shutter operating at twice the frame rate or better, to minimize flicker. It would be unwatchable otherwise. See http://en.wikipedia.org/wiki/Movie_projector#Shutter http://en.wikipedia.org/wiki/Movie_projector#Shutter