An equiconvex lens is cut into two halves along (i) XOX'
and (ii) YOY' as shown in the figure. Let f, f', f'' be the focal
lengths of the complete lens, of each half in case (i), and of
each half in case (ii), respectively
Choose the correct statement from the following
(a) f ' = 2f, f '' = 2f (b) f ' = f, f '' = 2f
(c) f ' = 2f, f '' = f (d) f ' = f, f '' = f
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