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When we enter a dark room coming from outside, immediately the things inside the room do not appear clear to our eyes. This is because
(a) pupils do not open at all in the dark.
(b) pupils take time to adjust.
(c) light travels slower in a dark room.
(d) pupils open very quickly in the dark.
Answer
- When we enter a dark room coming from outside, immediately the things inside the room do not appear clear to our eyes.
- This is because pupils take time to adjust .
- Pupil is a hole in the middle of the iris , which appears black because the light that passes through it gets absorbed by the retina and is not reflected back .
- Thus, when it’s dark, pupil becomes big so as to absorb more light from the environment
So, the correct answer is (b) - pupils take time to adjust
