Question

A bulb is placed between two plane mirrors inclined at an angle of $60{}^{\circ }$ . The number of images formed is

• A. 5
• B. 6
• C. 4
• D. 3

Answer 1

Answer: (A)

$n=\frac{360{}^{\circ }}{\theta }-1$ Given, $\theta =60{}^{\circ }$ $\Rightarrow$ $n=\frac{360{}^{\circ }}{60{}^{\circ }}-1$ $\Rightarrow$ $n=6-1=5$