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Question

What is the relation between refractive indices μ1,μ2 and μ3 if the behaviour of light rays is as shown in the figure. The refractive index of medium to the left of the lens is μ1 , that of lens is μ3 and that of medium to the right of lens is μ2 .


A

μ3<μ2,μ1=μ3

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B

μ2<μ1,μ2=μ3

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C

μ3<μ2<μ1

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D

μ3>μ2>μ1

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Solution

The correct option is A

μ3<μ2,μ1=μ3


The central ray goes undeviated, so, μ2=μ1 Also,μ3<μ2


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