Question

In Huygens eyepiece

• A. the cross wires are outside the eyepiece
• B. condition for achromatism is satisfied
• C. condition for minimum spherical aberration is not satisfied
• D. the image formed by the objective is a virtual image

Answer 1

Answer: (B)

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