Periscope is used in submarines. How does arrangement of plane mirrors help people see using the periscope?

If the object is at a distance of $3 \mathrm{cm}$ from the plane mirror, then the distance of the image will be:

Vimal combs her hair is front of a plane mirror. Write two characteristics of her image.

How can you identify a plane, concave and convex mirror by observing image formation?

Image formed by a plane mirror is erect, virtual and _____.

Three plane mirrors form an equilateral triangle with each side of length $L$. There is a small hole at a distance $l>0$ from one of the corners as shown in the figure. A ray of light is passed through the hole at an angle $\theta$ and can only come out through the same hole. The cross section of the mirror configuration and the ray of light lie on the same plane.

Which of the following statement(s) is(are) correct?

A point source of light, $S$ is placed at a distance $L$ in front of the center of plane mirror of width $d$ which is hanging vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror, at a distance $2L$ as shown below. The distance over which the man can see the image of the light source in the mirror is:

Write any three differences between plane and convex mirror.

Two plane mirrors are kept on a horizontal table making an angle $\theta$ with each other as shown schematically in the figure. The angle $\theta$ is such that any ray of light reflected after striking both the mirrors return parallel to its incident path. For this to happen, the value of $\theta$ should be