Physics - Geometrical Optics Question with Solution | TestHub

Two mirrors at angle $\theta$, object on the bisector: if $360/\theta$ is even, $n=\frac{360}{\theta }-1$.

$\theta =30^{\circ }\to 11$, $\theta =36^{\circ }\to 9$, $\theta =22.5^{\circ }\to 15$.

For $\theta =50^{\circ }$, $360/50=7.2$ is fractional, giving $n=8$.

So A $\to$ Q, B $\to$ P, C $\to$ S, D $\to$ R.

Answer: D