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AP EAMCET2009PhysicsRay Optics

The two lenses of an achromatic doublet should have

Options

  1. Aequal powers
  2. Bequal dispersive powers
  3. Cequal ratio of their power and dispersive power
  4. Dsum of the product of their powers and dispersive power equal to zero

Correct answer

C. equal ratio of their power and dispersive power

Step-by-step solution

The two lenses of an achromatic doublet should have, sum of the product of their powers and dispersive power equal to zero.

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