A thin lens made of glass of refractive index m = 1.5 has a focal leng – McqOptions

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1.	A thin lens made of glass of refractive index m = 1.5 has a focal length equal to 12 cm in air. It is now immersed in water \[\left( \mu \,=\,\frac{4}{3} \right)\]. Its new focal length is [UPSEAT 2002]
A.	48 cm
B.	36 cm
C.	24 cm
D.	12 cm
Answer» B. 36 cm

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