A converging lens of refractive index …

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Gaurav Seth 5 years ago
Q : A converging lens of refractive index 1.5 is kept in a liquid medium having same refractive index. What would be the focal length of the lens in this medium?
A n s w e r :
The focal length of lens in a liquid-medium is given by
i.e., focal length of converging lens is infinity i.e., glass lens behaves as a glass plate.
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