Question

explain why , we cannot see our surrounding clearly when we enter a darkened cinema hall from bright sunshine but our vision improves after some times

Answer 1

This is due to enlargement of iris in the dark cinema hall to let light enter easily into your eye but when you step out of the dark hall the because lots of light enter your eye then your eye is not able to focus and form an image on your retina and you can not look properly to the things but after some time your iris rearranges its size becomes small to focus the image on retina.

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