Q.

Persistance of vision is the principle behind –

A. Camera
B. Spectroscope
C. Cinema
D. Periscope
Answer» C. Cinema
Explanation: Persistence of vision is the phenomenon of the eye by which an afterimage is thought to persist for approximately one twenty-fifth of a second \ on the retina. Persistence of vision is still the accepted term for this phenomenon in the realm of cinema history and theory.
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