The change in focal length of an eye lens is caused by the action of the
(c) ciliary muscles
The action of the ciliary muscles changes the focal length of an eye lens
Why does the sky appear dark instead of blue to an astronaut?
Why does the Sun appear reddish early in the morning?
Explain why the planets do not twinkle?
Why do stars twinkle?
What happens to the image distance in the eye when we increase the distance of an object from the eye?