Editing Mirror (section)

===Prehistory===
The first mirrors used by humans were most likely pools of still water, or shiny stones.<ref>{{Cite book |last1=Melchior-Bonnet |first1=Sabine |title=The mirror: a history |last2=Jewett |first2=Katharina H. |last3=Delumeau |first3=Jean |date=2001 |publisher=Routledge |isbn=978-0-415-92447-4 |location=New York London}}</ref> The requirements for making a good mirror are a surface with a very high degree of [[Flat space|flatness]] (preferably but not necessarily with high [[reflectivity]]), and a [[surface roughness]] smaller than the wavelength of the light.

The earliest manufactured mirrors were pieces of polished stone such as [[obsidian]], a naturally occurring [[volcanic glass]].<ref name=fior2009/> Examples of obsidian mirrors found at [[Çatalhöyük]] in [[Anatolia]] (modern-day Turkey) have been dated to around 6000&nbsp;BCE.<ref name=enoch/> Mirrors of polished copper were crafted in [[Mesopotamia]] from 4000&nbsp;BCE,<ref name=enoch/> and in ancient Egypt from around 3000&nbsp;BCE.<ref name=stoc/> Polished stone mirrors from Central and South America date from around 2000&nbsp;BCE onwards.<ref name=enoch/>