Film
is a term that encompasses motion pictures as individual
projects, as well as the field in general. The origin
of the name comes from the fact that photographic
film (also called filmstock) has historically been
the primary medium for recording and displaying motion
pictures. Many other terms exist — motion pictures
(or just pictures or "picture"), the silver
screen, photoplays, the cinema, picture shows, flicks
— and commonly movies.
Films are produced by recording actual people and
objects with cameras, or by creating them using animation
techniques and/or special effects. They comprise a
series of individual frames, but when these images
are shown rapidly in succession, the illusion of motion
is given to the viewer.
Flickering between frames is not seen 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. Also of relevance is what
causes the perception of motion — a psychological
effect identified as beta movement. |
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