Q7 of 42 Page 295

A plane mirror produces a magnification of:

A plane mirror produce an image of the same size as the object. Thus, the value of magnification is 1 for a plane mirror.
The formed image is virtual. The magnification is positive for a virtual image. Thus, the magnification by a plane mirror is + 1.

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5

A beam of light incident on a plane mirror forms a real image on reflection. The incident beam is:

 6

If an object is placed symmetrically between two plane mirrors, inclined at an angle of 72°, then total number of images formed is:

 8

A dice is place with one of its edges parallel to the principal axis between the principal focus and the centre of curvature of concave mirror. Then the final image has the shape of:

 9

Two adjacent walls and the ceiling of a rectangular room are mirror surfaced. The number of images of himself that an observer sees is: