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Question:
How many images of a person are formed who is in a room whose two adjacent walls and ceiling are plain mirror also explain how,
Answer:

The number of images (n) formed by two mirrors inclined to each other at an angle x is given by (360/x) - 1.

Here, all the three mirrored walls are perpendicular, that is x = 90 degrees.

Let us consider two adjacent walls, so the number of omages fprmed will be (360/90) - 1

= 4 - 1 = 3

These images formed by the combination of two adjacent walls in addition to the object itself act as objects for the ceiling mirror (totally 4), thus then the total number of images formed will be 

3 + 4 = 7 images.

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