Question

An object 2cm height is placed at a distance of 12 cm from a concave mirror which produces a real image

of 4 cm height. Find the image distance​

Answer 1

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hi/ho=-v/u

4/2=-v/12

v=-24

1/f=1/u+1/v

1/f=1/12+1/-24

1/f=-2+1/24

f=-24cm

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