Because of this 3-word optical phenomenon, still images projected at 24 frames per second seem to be moving pictures
[DOC] [TLE] Origins - Sacred Heart University [PAR] Most motion-picture cameras today expose individual frames at the rate of 24 ... 
per frame (the other forty-eighth of a second allows time for the film to move from 
... the phi phenomenon were exploited for the purpose of optical entertainment for 
...