$A$ man runs towards a plane mirror at a speed of $15 \, m/s$. The speed of the image relative to the man is $...... \, m/s$.

The light rays from an object are reflected by a standard plane mirror towards an observer. The image formed has the following characteristics:
$A$: Real
$B$: Erect
$C$: Magnified
$D$: Laterally inverted
Which of these characteristics are correct?

By what angle should $M_2$ be rotated,so that the light ray after reflection from both mirrors becomes horizontal? (The angle of incidence at mirror $M_1$ is $40^{\circ}$ and the angle between $M_2$ and the horizontal is $25^{\circ}$ as shown in the figure.)

$A$ small object is placed $10\, cm$ in front of a plane mirror. If you stand behind the object $30\, cm$ from the mirror and look at its image,the distance focused for your eye will be........$cm$.

$A$ light beam is being reflected by using two mirrors,as in a periscope used in submarines. If one of the mirrors rotates by an angle $\theta$,the reflected light will deviate from its original path by the angle

$A$ 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.