1.

A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is [CPMT 1991; NCERT 1979; BHU 2005]

A.            Equal to unity                      
B.            Equal to 1.33
C.                  Between unity and 1.33         
D.            Greater than 1.33
Answer» D.            Greater than 1.33


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