A thin convergent glass lens 
has a power of +5.0 D. When this lens is immersed in a liquid of refractive index 
it acts as diverging lens of focal length 100 cm. The value of 
should be
A
B
C
D
2
Text Solution
Verified by ExpertsThe correct answer is:
C
When the lens in air, we have
When the lens is in liquid, we have
Given, 
and 
On solving, we get 
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