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Q.

An object of height h = 5 cm is located at a distance a = 12 cm from a concave mirror with focal length 10 cm. Then height of image:

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a

10 cm

b

15 cm

c

20 cm

d

25 cm

answer is D.

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Detailed Solution

1v+1u=1fv=ufu−f=(−12)(−10)−12−(−10)=−60 cmhi5=−vu⇒hi5=−−60−12⇒hi=−25cm
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