Question

) A diverging lens has focal length 20 cm. At what distance should an object be placed so that image is formed at 10 cm from the lens. What is the magnification produced by the lens. ​

Answer 1

Answer:

we have to keep object anywhere between pole and infinity so as to get an image at a distance of 10 cm(I.e., between F and P)

we are given focal length=-20cm

image distance=-10cm

by mirror formula, we will find object distance as=-20cm

now by linear magnification,

M=v/u

M=-10/-20

M= 2

hope it helps u

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