The combination of a convex lens (f = 18 cm) and a thin concave lens ( – McqOptions

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1.	The combination of a convex lens (f = 18 cm) and a thin concave lens (f = 9 cm) is [AMU (Engg.) 2001]
A.	A concave lens (f = 18 cm)
B.	A convex lens (f = 18 cm)
C.	A convex lens (f = 6 cm)
D.	A concave lens (f = 6 cm)
Answer» B. A convex lens (f = 18 cm)

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