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.