Question

Why does it take some time to see the surroundings clearly in a dark cinema hall when a person enters from the bright sunlight?

Answer 1

1. When we are in bright sunlight the objects are clearly visible with less amount of light passing through the retina.
2. In this case, the pupil of the eye is small in size usually says contracted.
3. When we suddenly enter the dark cinema hall, we need more light to pass through the eye to see the objects clearly.
4. So, the pupil of the eye expands to make more light pass through it.
5. It takes some time to make the eye expand from the small size.
6. Therefore, it takes some time to see the objects clearly when we enter the dark cinema hall from the right sunlight.