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      Question

      Persistance of vision is the principle behind –

      A Camera Correct Answer Incorrect Answer
      B Spectroscope Correct Answer Incorrect Answer
      C Cinema Correct Answer Incorrect Answer
      D Periscope Correct Answer Incorrect Answer

      Solution

      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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