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Question

A biconvex lens of refractive index μ1 , is immersed in a liquid of refractive index μ2 . If a beam of parallel rays incident on the lens and the emergent rays are divergent then the correct choice is

A
μ1>μ2
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B
μ1<μ2
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C
μ1=μ2
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D
μ2=μ12
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Solution

The correct option is B μ1<μ2
μ1μ2

1f=(μeoq1)(1R11R2)

divergentμ1μ21<0μ1<μ2

since biconvex(1R11R2)>0

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