Q.

An object 15 cm high is placed 10 cm from the optical centre of a thin lens. Its image is formed 25 cm from the optical centre on the same side of the lens as the object. The height of the image is

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a

2.5 cm

b

0.2 cm

c

16.7 cm

d

37.5 cm

answer is D.

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Detailed Solution

IO=vuI15=−15−10;  I=15×2.5cm=37.5 cm
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An object 15 cm high is placed 10 cm from the optical centre of a thin lens. Its image is formed 25 cm from the optical centre on the same side of the lens as the object. The height of the image is