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The two lenses of an achromatic doublet ...

The two lenses of an achromatic doublet should have

A

Equal powers

B

Equal dispersive powers

C

Equal ratio oftheir power and dispersive power

D

Sum of the product of their powers and dispersive power equal to zero

Text Solution

Verified by Experts

The correct Answer is:
D
The condition for an achromatic doublet is `omega_(1)/f_(1) + omega_(2)/(f_(2))=0`
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