Q87 of 112 Page 312

A device which works on the reflection of light from two plane mirrors arranged parallel to one another is:

Periscopes are used to see objects that are not in direct line of sight.

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85

The image of an object formed by a plane mirror is:

 86

Which of the following is a non-luminous object?

 88

The number of images formed of an object placed between two plane mirrors inclined at right angles to each other is:

 89

As the angle between two plane mirrors is decreased gradually, the number of images of an object placed between them: