Two vertical plane mirrors are inclined at an angle of with each other. A ray of light travelling horizontally is reflected first from one mirror and then from the other. The resultant deviation is ____.
A plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the mirror is ____.
parallel
convergent
divergent
None of the above
What should be the angle between two plane mirrors so that whatever be the angle of incidence, the incident ray and the reflected ray from the two mirrors be parallel to each other?
A plane mirror reflecting a ray of incident light is rotated through an angle about an axis through the point of incidence in the plane of the mirror perpendicular to the plane of incidence, then ____.
the reflected ray does not rotate
the incident ray is fixed
A plane mirror is approaching you at a speed of You can see your image in it. At what speed will your image approach you?
A light bulb is placed between two plane mirrors inclined at an angle of The number of images formed are ____.
6
2
5
4
It is desired to photograph the image of an object placed at a distance of from the plane mirror. The camera which is at a distance of from the mirror should be focused for a distance of ____.
A thick plane mirror shows a number of images of the filament of an electric bulb. Of these, the brightest image is the ____.
first
second
fourth
last
A man is tall and his eyes are below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of from him. The minimum length of the plane mirror required is ____.
A person is in a room whose ceiling and two adjacent walls are mirrors. How many images are formed?
5
6
7
8
When a plane mirror is placed horizontally on a level ground at a distance of from the foot of a tower, the top of the tower and its image in the mirror subtend an angle of at the eye. The height of the tower is ____.
A ray of light incidents on a plane mirror at an angle of The deviation produced in the ray is ____.
A ray of light is incidenting normally on a plane mirror. The angle of reflection is ____.
Will not be reflected
None of the above
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 ____.
None of the above
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?
None
1
2
3
When a plane mirror is rotated through an angle then the reflected ray turns through the angle then the size of the image____.
is doubled
is halved
remains the same
becomes infinite
A plane mirror produces a magnification of ____.
Zero
A plane mirror makes an angle of with horizontal. If a vertical ray strikes the mirror, find the angle between mirror and reflected ray ____.
A man runs towards mirror at a speed of What is the speed of his image?
7.5 m/s
15 m/s
30 m/s
45 m/s
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 is ____.
60 cm
20 cm
40 cm
80 cm