$A$ ray of light is incident normally on a plane mirror. The angle of reflection will be......$^o$

Two plane mirrors are at right angles to each other. $A$ man stands between them and combs his hair with his right hand. In how many of the images will he be seen using his right hand?

$A$ plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the mirror is

When an object is placed between two parallel mirrors,the number of images formed is:

With reference to the figure shown below, match the following:

$(a)$ Angle of reflection	$(i)$ $60^\circ$
$(b)$ Value of $\alpha$	(ii) $120^\circ$
$(c)$ Angle of deviation	(iii) $30^\circ$

$A$ light ray makes an angle of $10^o$ with the horizontal. It strikes a plane mirror inclined at an angle $\theta$ to the horizontal,and the reflected ray becomes vertical. What is the value of the angle $\theta$ in degrees?