Question

In the figure shown, a point object $O$ is placed in air on the principal axis. The radius of curvature of the spherical surface is $60cm$. $I$ is the final image formed after all reflections and refractions.

• A. If $x=120cm$, then $I$ is formed on $O$ for any value of $y$
• B. If $x=240cm$, then $I$ is formed on $O$ only if $y=360cm$
• C. If $x=240cm$, then $I$ is formed on $O$ for any value of $y$
• D. None of the above

Answer 1

Answer: (A), (B)

The correct options are
A If $x=120cm$, then $I$ is formed on $O$ for any value of $y$
B If $x=240cm$, then $I$ is formed on $O$ only if $y=360cm$