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raman_shadow (754)

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Olaaa!! Perrrfect answer. 132  [179 rates]

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When we wave our hands very fast in front of an ordinary light (a bulb or a tube light) we see the image of our hand waving in a continuous motion
(though it seems blurred and distorted).

But when we do the same in front of a computer screen or a TV the motion of our hand appears as if it is viewed in frames (with some pauses in between).

Why is it so?

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