Focal length of a convex lens of refractive index 1.5 is 2 cm. Focal l – McqOptions

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1.	Focal length of a convex lens of refractive index 1.5 is 2 cm. Focal length of lens when immersed in a liquid of refractive index of 1.25 will be [CBSE PMT 1993]
A.	10 cm
B.	2.5 cm
C.	5 cm
D.	7.5 cm
Answer» D. 7.5 cm

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