Question
Why does it take some time to see objects in a dim room when you are the room from bright sunlight outside?
Solution
When a person is out in the bright sunlight, iris causes the pupil to contract so that only small portion of light enters the eye and rods of the retina are also adjusted in the same way. And, suddenly when a person enters into a dimly-lit room, each iris takes some time to increase the diameter of the pupil, so that more amount of light can enter the eyes to see the object clearly. The rod cells of the retina also take some time to adjust themselves to get the picture of the object in dim light.
