Question

The angle between the incident ray and the reflecting surface is ${60}^o$. What is the angle of reflection?

• A. ${60}^{\circ }$
• B. ${30}^{\circ }$
• C. ${15}^{\circ }$
• D. ${45}^{\circ }$

Answer 1

The correct option is B

${30}^{\circ }$

Angle made by the incident ray with the reflecting surface $={60}^o$.
We know, the angle of incidence is the angle between the incident ray and the normal. The normal is perpendicular to the reflecting surface.
So, angle of incidence $={90}^o-{60}^o={30}^o$
From the laws of reflection, angle of reflection = angle of incidence $={30}^o$