Question

If two mirrors are kept at $60^{\circ }$ to each other and a body is placed at the middle, then total number of images formed, is

• A. six
• B. five
• C. four
• D. three

Answer 1

Answer: (B)

Since the angle of inclination $\theta =60^{\circ }$
$\therefore n=\frac{360^{\circ }}{60^{\circ }}=6$ which is even
$\therefore$ no. of images formed for any position of the object in between the mirrors $=6-1=5$
$\left(n\right)=\frac{360^{\circ }}{\theta }-1$
$\Rightarrow \frac{360^{\circ }}{60}-1$
$\Rightarrow 6-1$
$\Rightarrow 5$