The two lenses of an achromatic doublet shoul | vedclass

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(D) For an achromatic doublet, the condition to eliminate chromatic aberration is that the sum of the product of the power $(P)$ and the dispersive po

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

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(D) For an achromatic doublet, the condition to eliminate chromatic aberration is that the sum of the product of the power $(P)$ and the dispersive power $(\omega)$ of the two lenses must be zero.Mathematically, this is expressed as: $P_1 \omega_1 + P_2 \omega_2 = 0$.Therefore, the sum of the product of their powers and dispersive powers must be equal to zero.

The two lenses of an achromatic doublet should have:

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