A convex lens of power + 6D is placed in contact with a concave lens o – McqOptions

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1.	A convex lens of power + 6D is placed in contact with a concave lens of power ? 4D. What is the nature and focal length of the combination [AMU (Engg.) 1999]
A.	Concave, 25 cm
B.	Convex, 50 cm
C.	Concave, 20 cm
D.	Convex, 100 cm
Answer» C. Concave, 20 cm

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