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What shape are your eye-lenses:(a) when you look at your hand?(b) when you look at a distant tree?
(a) The shape of our eye lenses becomes thick when we look at our hand.
This is because, when we look at a nearby object, the eye lens becomes thick or more convex and the converging power becomes large. As the converging power increases, the thick eye-lens can converge the diverging light rays coming from the nearby object (our hand) to form an image on the retina of the eye.
Image is posted for reference only
(b) The shape of our eye lenses becomes thin when we look at a distant tree.
This is because, when we look at a distant object (at infinity), the eye lens becomes thin or less convex and the converging power becomes small. As converging power decreases, the thin eye-lens is sufficient to converge the parallel light rays coming from the distant object (the tree) to form an image on the retina of the eye.
Image is posted for reference only
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