1.

We combined a convex lens of focal length f1 and concave lens of focal lengths f2 and their combined focal length was F.  The combination of these lenses will behave like a concave lens, if                                           [KCET 2000]

A.            f1 > f2                                       
B.            f1 < f2
C.            f1 = f2                                       
D.            f1 \[\le \] f2
Answer» B.            f1 < f2


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