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A convex lens is dipped in a liquid whos...

A convex lens is dipped in a liquid whose refractive index is equal to the refractive of the lens. Then its focal length will

A

becomes zero

B

becomes infinite

C

remains unchanged

D

becomes reduced but not zero

Text Solution

Verified by Experts

The correct Answer is:
B
`(f_(liq))/(f_(air))=((mu_(g)-1)mu_(l))/((mu_(g)-mu_(l))`
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