Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?

Answer:

The impression of an image does not fade from our retina instantaneously but rather remains for 1/16th of a second. If we move our hands quicker than this, it will appear as if they are moving in a blurred manner. This is what is happening with Boojho, as his fingers are becoming blurred as a result of his hand’s fast movement.

The persistence of vision is the reason for the blurred vision of Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred.

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