Question

When the angle of reflection is ${40}^o$, the angle between normal and the mirror will be :

• A. ${40}^o$
• B. ${90}^o$
• C. ${45}^o$
• D. ${60}^o$

Answer 1

The correct option is B ${90}^o$

Normal ray is always perpendicular to the mirror. So normal always makes an angle of ${90}^o$ with the mirror irrespective of the angle of incidence or of angle of reflection.