A concave mirror is used to focus the image of a flower on a nearby well 120 cm 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
8 cm
b
12 cm
c
80 cm
d
120 cm
answer is A.
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Detailed Solution
Let distance =u. Now vu=16 and v=u+120 ∴120+uu=16⇒15u=120⇒u=8cm