$A$ light ray is incident perpendicular to the plane of a mirror. The angle of reflection will be ......$^o$.

$A$ man of height $170\, cm$ wants to see his complete image in a plane mirror (while standing). His eyes are at a height of $160\, cm$ from the ground.

What are the types of mirrors?

To get three images of a single object, the angle between the two plane mirrors should be (in $^{\circ}$)

$A$ clock hung on a wall has marks instead of numbers on its dial. On the opposite wall there is a mirror,and the image of the clock in the mirror,if read,indicates the time as $8:20$. What is the actual time in the clock?

Two mirrors $AB$ and $CD$ are arranged along two parallel lines. The maximum number of images of object $O$ that can be seen by any observer is