Question

A biconvex lens of glass of refractive index 15 having focal length 20 cm is placed in a medium of refractive index 165. Find its focal length. What should be the value of the refractive index of the medium in which the lens should be placed so that it acts as a plane sheet of glass ?

Answer 1

Answer:

you should use proper scale and diagram for your answer

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Answer 2

Hey!!

Good Morning!!

You should use proper scale

and diagram for your answer

Mark as brainliest to me !!