Concave mirror

This mirror has a special property. When you are at a certain distance of the mirror, an image of yourself is formed before the mirror. This enables you to shake your own hand, so to speak. A mirror reflects light according to the following law: æthe angle of incidence is equal to the angle of reflectionÆ. This causes a true-to-life image of equal size in a plane mirror. In a concave mirror like this one, the image is magnified, just like, for example, in a shaving mirror. However, when you are beyond the focus of this concave mirror, you see an upside-down image and the optical illusion is formed. The focus is the point where all light beams after reflection seem to have their origin and where you seem to see the reflected image. Because of these properties, concave mirrors were often used in reflecting telescopes. Apart from optical demonstrations, concave mirrors were also used to ignite objects. A concave mirror is therefore also called burning glass.