An achromatic convergent doublet has power of \( +2 \mathrm{D} \). ...

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An achromatic convergent doublet has power of \( +2 \mathrm{D} \). If power of convex lens is \( + \) \( 5 D \), then ratio of the dispersive powers of a convergent and divergent lenses will be
\( \mathrm{P} \)
(A) \( 3: 5 \)
(B) \( 2: 5 \)
W
(C) \( 2: 3 \)
(D) None of these
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