In Huygen's eyepiece

In Huygen's eyepiece
  1. the cross wires are outside the eyepiece
  2. condition for achromatism is satisfied
  3. condition for minimum spherical aberration is not satisfied
  4. the image formed by the objective is a virtual image

Solution

Huygen eyepiece satisfies the conditions for elimination of the chromatic aberration as well as spherical aberration.

Asked in: AP EAMCET 2007

Practice more Wave Optics questions on Aicharya