CBSE Class 10 Science
Question 4 of 16
The Human Eye and the Colourful World — Question 4
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Question Question 4
The change in focal length of an eye lens is caused by the action of the
- pupil
- retina
- ciliary muscles
- iris
ciliary muscles
Reason— The ciliary muscles contract to make the lens thinner and relax to make it thicker, thus changing its curvature and hence focal length.