Questions in Ray Optics and Optical Instruments

Select	Question
	When a plane mirror is placed horizontally on a level ground at a distance of $60$ m from the foot of a tower, the top of the tower and its image in the mirror subtend an angle of $90^\circ $ at the eye. The height of the tower will be
	A ray of light incidents on a plane mirror at an angle of $30^\circ .$ The deviation produced in the ray is
	A ray of light is incidenting normally on a plane mirror. The angle of reflection will be
	When light wave suffers reflection at the interface from air to glass, the change in phase of the reflected wave is equal to
	A ray is reflected in turn by three plain mirrors mutually at right angles to each other. The angle between the incident and the reflected rays is
	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
	When a plane mirror is rotated through an angle $\theta $then the reflected ray turns through the angle $2\theta $ then the size of the image
	A plane mirror produces a magnification of
	A plane mirror makes an angle of $30^\circ $ with horizontal. If a vertical ray strikes the mirror, find the angle between mirror and reflected ray
	A watch shows time as $3:25$ when seen through a mirror, time appeared will be