Question

(a) How does the convex eye-lens differ from the ordinary convex lens made of glass?
(b) List, in order, the parts of the eye through which light passes to reach the retina.

Answer 1

Ciliary Muscles Change the Converging Power

Explanation:

• (a) The focal length of the convex eye lens and its converging power can be changed by the action of the ciliary muscles, whereas the focal length of a convex lens made of glass cannot be changed.

• (b) The order of the parts of the eye through which light passes is as follows:

1. Cornea

2. Iris

3. Pupil

4. Eye lens

5.Vitreous humor

Finally, from the vitreous humor, light reaches the retina, which has light-sensitive cells.