User can create, shape and manipulate mirrors, objects that reflect light in a way that preserves much of its original quality subsequent to its contact with the mirror. Most mirrors are designed for visible light; however, mirrors designed for other types of waves or other wavelengths of electromagnetic radiation are also used, especially in non-optical instruments. Though mirrors are often made from glass, they can also be made of other reflective substances such as crystal, salt, ice, or polished metals.