Question

A ray of light incident on the first mirror parallel to the second and is reflected from the second mirror parallel to first mirror. The angle between two mirrors is

• A. ${30}^{\circ }$
• B. ${60}^{\circ }$
• C. ${75}^{\circ }$
• D. ${90}^{\circ }$

Answer 1

The correct option is B ${60}^{\circ }$

From geometry of figure
$\theta +\theta +\theta ={180}^{\circ }\Rightarrow \theta ={60}^{\circ }$