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Q.

A point object is placed on the optic axis of a convex lens of focal length f at a distance of 2 f to the left of it. the diameter of the lens is 'd'. An eye is placed at a distance of 3f to the right of the lens and a distance h below the optic axis. The maximum value of h to see the image is

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a

d

b

d/2

c

d/3

d

d/4

answer is D.

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Detailed Solution

Question Image

From two similar triangles hd/2=f2f  or  2hd=12  or  h=d4

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