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Question

A series of fast moving still pictures can create an illusion of movement. Why?

A
The eye can focus on very rapidly changing pictures.
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B
The eye receives responses quicker than those received by the brain.
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C
The eye can separate two images only when the interval of separation between them is more than some fixed amount of time.
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D
The image of fast moving still pictures cannot be formed on the retina.
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Solution

The correct option is C The eye can separate two images only when the interval of separation between them is more than some fixed amount of time.

A series of fast moving still pictures can create an illusion of movement. This is because the eye can separate two images only when the interval of separation between them is at least one-sixteenth of a second. This happens due to the phenomenon called persistence of vision.

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