Question

A 40cm high object is placed at a distance of 60 cm from a concave lens of focal length 20 cm. Find the size of the image.​

Answer 1

Answer:

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Explanation:

ANSWER

Here u=−60cm

Lets v be the distance of image 

f=−20cm

f1=v1−u1

−201=v1−−601

v=−15 cm

Magnification m=uv=−60−15=41

Size of image is 4×m=4×41=1cm

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