In the following figures, optical instruments are placed inside boxes (a) and (b). Which of the following options is correct for these?

Options

A. In (a), the incident rays are diverged after refractions, so lens is concave.
B. In (b), the incident rays are converged after coming out of the box, so mirror is convex.
C. In (a), the incident rays are diverged after coming out of the box, so mirror is convex.
D. In (b), the incident rays are converged after refraction, so lens is concave.

Answer

A

Explanation

In (a), the incident rays are diverged after refraction, so the lens is concave and in (b), the incident rays are converged after refraction, so the lens is convex.