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Why are we not able to see the things cl...

Why are we not able to see the things clearly when we come out of a drak room?

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When we are in dark, pupil size is bigger, as we come out of dark room, its size needs to become smaller. For that time interval the person is unable to see.
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CPC CAMBRIDGE PUBLICATION-CPC MODEL QUESTION PAPER 6-ANSWER THE FOLLOWING
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