What is meant by persistence of vision?

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(N/A) The impression of an object seen by the eye persists on the retina for $1/16$ of a second,even after the object is removed from the field of view.
If another object is seen before this time interval,the impressions of the two objects merge in the brain to give us the sensation of continuity.
This property of the human eye is known as persistence of vision.

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