Question

(A) : Huygens' eyepiece cannot be used in telescopes
(B) : There is no provision of cross wires in case of a Huygens' eyepiece

• A. A true, B false
• B. A false, B true
• C. A false, B false
• D. A true, B true

Answer 1

The correct option is D A true, B true

Huygen's eye-piece cannot be used in telescope because it do not contain cement to hold the lens elements. There is no provision of cross wires in case of a Huygen's eye piece.