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Q.

When a converging lens of refractive index n1 is placed in a liquid of refractive index  n2, the lens behaves as diverging , then

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a

n2>n1

b

n2<n1

c

n1=n2

d

n2=0

answer is B.

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Detailed Solution

1f=μ-12R

1fm=μ-μlμl2R

dividing we get fmf=μlμ-1μ-μl

if  μl>μ fm will be opposite in nature of f

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