Question

The pupil of the eye changes its size to adjust for

• A. objects at different distances
• B. different amount of light
• C. objects of different sizes
• D. different colours

Answer 1

Answer: (B)

different amount of light

The pupil of our eye is an entrance for the light rays to enter our eyes and give us the sensation of sight.

If too much light enters our eyes, it can be dangerous for our eyes. So, whenever the light is strong, the pupil shrinks in order to reduce the entrance of strong light and protect our eyes.

On the other hand, if too little light enters our eyes, we don't get a clear vision. Whenever the light is weak, the pupil expands in order to increase the entrance of light and improve the vision.

This is how the pupil of the eye changes its size to adjust for different amounts of light.