Physics - Geometrical Optics Question with Solution | TestHub

When a light ray falls on a mirror at an angle$30°$, then the reflected ray will make the same angle with the plans as shown in Figure (i)

In order to make the reflected ray vertical, the mirror should be rotated at an angle of$60°$,

So, the mirror should be tilted by$\frac{60}{2}=30°$as shown in Figure. (ii)