Question

on ray optics class 12 pdf 5. We combine two lenses, one is convex and other is concave having focal lengths /, and f2 and their combined focal length is F. Combination of the lenses will behave like concave lens, if
(a) f1 > f2
(b) f1 = f2
(c) f1 < f2.
(d) f1 ≤ f2

Answer 1

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