Flat Mirror (continued)

Association of two flat mirrors

Two flat mirrors can be associated, with the reflective surfaces facing each other and forming an angle between them, with values ​​between 0 ° and 180 °.

For reasons of symmetry, the object point and the image points are situated on a circle.

To calculate the number of images that will be seen in the association use the formula:

Being the angle formed between the mirrors.

For example, when the mirrors lie perpendicularly, ie =90°:

Therefore, in this configuration are seen 3 image points.