Question

The size of the pupil becomes ____ when you see in the dim light.

Answer 1

Pupil :

1. Pupil in the eyes appears dark since most of the incident rays of light don't scatter and enter the eyes and thus appear black.
2. The muscular front of the eye called the iris controls the movement of the pupil.
3. The pupil expands in dim light to facilitate more incident light rays in low levels of light.
4. Thus pupil expands in the dim light in order to regulate vision.

Final Answer: The size of the pupil becomes large when you see in the dim light.