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Q.

A concave mirror is used to focus the image of a flower on a nearby well 120cm from the flower. If a lateral magnification of 16 is desired, the distance of the flower from the mirror should be

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a

8cm

b

12cm

c

80cm

d

120cm

answer is A.

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Detailed Solution

Given,

 vu=16 and v=u+120 120+uu=16 15u=120 u=8cm

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