Question

When you enter a dim lighted room from sunlight at noon time. What is the change in size of pupil?

• A. In the sunlight pupil contracts and after entering a dim lighted room the size of pupil increases.
• B. In dim light size of pupil decreases and in sunlight the pupil size increases
• C. Both A and B can occur.It depends on the size of eye
• D. No change in size of pupil

Answer 1

The correct option is A In the sunlight pupil contracts and after entering a dim lighted room the size of pupil increases.

Pupil control the light rays enter into the eyes.

In sunlight, the size of the pupil decreases because of high light-intensity but in dim light, the pupil gets enlarged and increase the area to enter more light ray because the low intensity and thus lets more light into the eye.