A thin convex lens of refractive index 1.5 has a focal length of 15 cm – McqOptions

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1.	A thin convex lens of refractive index 1.5 has a focal length of 15 cm in air. When the lens is placed in liquid of refractive index 4/3 , its focal length will be [CPMT 1974, 77; MP PMT 1992]
A.	15 cm
B.	10 cm
C.	30 cm
D.	60 cm
Answer» E.

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