Question

2.
How does lens in human eye help to see objects at short distance​

Answer 1

Answer:

HUMAN EYE HAS CONVEX LENS WHICH CAN BE ACCOMODATED BY OUR CILLARY MUSCLES SO WHEN THERE IS A NEED OF DISTANT VISION OUR CILLARY MUSCLES GETS TIGHT AND STRECHES THE LENS WHICH LEADS TO THINNING OF LENS AND LOWERING OF CONVERGING POWER OF CONVEX LENS WHERE AS IF ONE WANT TO SEE NEAR BY OBJECT OUR CILILLARY MUSCLES GETS SOFT AND LENS GETS THICKER DUE TO WHICH CONVERGING POWER OF LENS INCREASES AND IMAGE FORMS ON RETINA .....

HOPE THIS HELPS PLEAEE MARK AS BRIANALIST

Answer 2

Answer:

The lens of human eye is hold by ciliary muscles which help the lens to become thin or thick simply to adjust its focal length.

When the ciliary muscles relax, the lens becomes thick, reducing the focal length. As the focal length decreases, objects kept at shorter distances are visible to the human eye.