Universal mirrors

During the battle of Syracuse (now IN Sicily), Archimedes allegedly used mirrors to set the Roman ships on fire. Nowadays, convex mirrors warn drivers on serpentine roads in. Another distorting mirror located at a chemist's in Sopot is used to make you thinner.

Compare the mirror that your sister uses to make her up, and the wing mirror in a car. The make-up mirror magnifies and the car mirror reduces the image. One of them is concave while the other is convex.

A big concave mirror in the Hubble's cosmic telescope is used to study distant galaxies. In few words: distorting mirrors sere to all purposes.