Question

Two mirrors are inclined at an angle $\theta$ as shown in the figure. Light ray is incident parallel to one of the mirrors. The ray will start retracting its path after third reflection if

• A. $\theta ={45}^o$
• B. $\theta ={30}^o$
• C. $\theta ={60}^o$
• D. all three

Answer 1

The correct option is B $\theta ={30}^o$

Option B is correct