A thin concave and a thin convex lens are in contact. The ratio of the – McqOptions

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1.	A thin concave and a thin convex lens are in contact. The ratio of the magnitude of power of two lenses is 2/3 and focal length of combination is 30cm, then the focal length of individual lenses are?
A.	– 15 cm, 10 cm
B.	– 75 cm, 50 cm
C.	75 cm, - 50 cm
D.	75 cm, 50 cm
Answer» B. – 75 cm, 50 cm

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