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Doctors Medicines MCQs Q&A

  1. Accommodation
  2. Persistence of vision
  3. Interference
  4. Short sightedness
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1 Answers

Option 2 : Persistence of vision

CONCEPT:

Persistence of vision:

  • Persistence of vision is the capacity of the eye to maintain an image on the retina for a moment after the image has disappeared.
  • This is due to a prolonged chemical reaction.
  • The impression of an object seen by the eye persists on the retina for 1 /16 th of a second, even after the object is removed
  • If another object is seen before this time, the impressions of the two object merge to give us the sensation of continuity.
  • This property of eye is called persistence of vision.

EXPLANATION:

  • Animation, motion pictures or films, make use of persistence of vision to create the illusion of movement.
  • In cinematography or movie projectors the difference between the two frames is less than 1/16 second.
  • Hence the continuous changing frames appear to us like a continuous movie. 
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