Films are made up of a series of individual images called frames. When these images are shown rapidly in succession, a viewer has the illusion that motion is occurring. The viewer cannot see the flickering between san diego hotel frames due to an effect known as persistence of vision, whereby the eye retains a visual image for a fraction of a second after the source has been removed. Viewers perceive motion due to a psychological effect called beta movement. The origin of the name "film" comes from the fact that photographic film (san francisco hotel also called film stock) has historically been the primary medium for recording and displaying motion pictures. Many other terms exist for an individual motion picture, including picture, picture show, moving picture, photo-play and flick. A common name for film in the United States is movie dubai hotels, while in Europe the term cinema is preferred. Additional terms for the field in general include the big screen, the silver screen, the cinema and the movies.