Question

Consider the following two statements $A$ and $B$ and identify the correct choice in the given answers:
$A$) The curved surface of plano-convex lenses in Ramsden's eyepiece face each other.
$B$) The focal length of field lens is 3 times the focal length of eye lens in Ramsden's eyepiece.

• A. Both A and B are true
• B. Both A and B are flase
• C. A is true and B is false
• D. A is false and B is true

Answer 1

Answer: (C)

A is true and B is false

In Ramsden's eye-piece curved surfaces of Plano-convex lenses face each other. The focal length of field lens is approximately same as that of the eye lens in Ramsden's eye piece.