How is the amount of the light entering the eye controlled? What changes are made in the eye to enable it to focus on abject situated at riff distances?
Answers
Answer:
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Answer:
The amount of light entering in your eye will be controlled by size of the pupil.
There are two changes made by eye to enable it focus i.e,
(i) When we see any object nearer then the size of the pupil will become smaller.
(ii) When we see any object farther then its size become larger.
Explanation:
As we know that pupil acts as an entrance of light inside our eye. It's the front aperture of the crystalline lens present in our eyes.
(i) What happen when we see at nearer object;
= The cilliary muscles relaxes which lead to the smallness of pupil. Here, in this case it's adjust's the focal length to see the nearer object perfectly.
(ii) What happen when we see at farther object;
= The cilliary muscles contracts which lead to the largeness of pupil. Here, in this case it's adjust's the focal length to see the farther object perfectly.
That's all.