Two plane mirrors are kept parallel at $20\mathrm{ }\mathrm{c}\mathrm{m}$ from each other. A point object $\mathrm{O}$ is placed exactly in between them. Calculate distance between second images formed by two mirrors.

A mirror is inclined at an angle of $\theta$ with the horizontal. If a ray of light is incident at an angle $\theta$ as shown, then the angle made by the reflected ray with the horizontal is 

In the given figure, velocity of image with respect to mirror is

A point source of light is placed in front of a plane mirror. Which of the following is true?

The figure shows two rays $\mathrm{A}$ and $\mathrm{B}$ being reflected by a mirror and going as ${\mathrm{A}}^{\text{'}}$ and $\mathrm{B}\text{'}$. The mirror