What is the persistence of vision ?? Explain it..!!
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What is the persistence of vision ?? Explain it..!!
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The time period for which the image formation remain on the retina of eye is called persistence of vision.
For a normal human eye , it is 1/16th part of a second.
It is assumed that the illusion that film historians often refer to as "persistence of vision" is the same as what is known as positive afterimages by psychologists. The cause of positive afterimages is not well known, but possibly reflects persisting activity in the brain when the retinal photoreceptor cells continue to send neural impulses to the occipital lobe.
Early descriptions of the illusion often attributed the effect purely to imperfections of the eye, particularly of the retina. Nerves and parts of the brain later became part of explanations.
Sensory memory has been cited as a cause.
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