1.

A glass convex lens \[({{\mu }_{g}}=1.5)\] has a focal length of \[8\,cm\] when placed in air. What would be the focal length of the lens when it is immersed in water ( \[{{\mu }_{w}}=1.33\])  [BHU 1994; MP PMT 1996]

A.            2 m                                           
B.            4 cm
C.            16 cm                                      
D.            32 cm
Answer» E.


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