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Q.

A Pin AB of length 2 cm is kept on the axis of a convex lens between 18 cm and 20 cm as shown in the figure focal length of the convex lens is 10 cm. Find the Magnification produced for the image of the Pin

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a

6.78

b

1

c

1.25

d

0.83

answer is C.

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Detailed Solution

1f=1v−1u 

110=1v−1−18

v=22.5 cm

magnification = vu=22.518

=1.25

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