Question

iv. An object kept 60 cm from a lens
gives a virtual image 20 cm in front
of the lens. What is the focal length
of the lens? Is it a converging lens or
diverging lens?​

Answer 1

Answer:

It's Diverging lens

as we know that,

Lens formula--1/v-1/u=1/f

1/20-1/-60=1/f

now,1/f= calculate it by yourself.

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Answer 2

Answer:

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