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Questions  

A 3 cm high object is placed on the principal axis of a concave mirror at a distance of 12 cm from the pole.  If the image is inverted, real and 6 cm high.  The location of the image and the focal length of the mirror is

a
30 cm, 8.6 cm
b
24 cm, 8 cm
c
30 cm, 10 cm
d
10 cm, 30 cm

detailed solution

Correct option is B

hIh0=m=-vu ⇒-63=-v-12⇒v=-24cm∴f=uvu+v⇒-12-24-12-24=8cm

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