Changes

====Colour and Reflection=== ====Subtractive Primary Colours====

: [[Colour]] exists because [[object]]s [[Absorb (Physics)|absorb]] some [[frequency|frequencies]] of [[light]] while but [[reflection|reflect]]s other [[colourfrequency|frequencies]]s are not.: A [[colour]]ed [[object]] [[Absorb (Physics)|absorbs]] some [[colour]]s and [[reflect]]s othersappearing the [[colour]] of the [[reflection|reflected]] [[light]]. For example [[leaf|leaves]] are green because the [[chlorophyll]] inside them [[Absorb (Physics)|absorbs]] red and blue [[light]] but not [[green]].: When [[colour]]ed [[object]]s are [[mixture|mixed]] such as paint they [[Absorb (Physics)|absorb]] certain [[colour]]s. The more different [[colour]] paints added, the more [[colour]]s they [[Absorb (Physics)|absorb]].: In [[art]] the focus is on these subtractive primary colours; Magenta, Cyan and Yellow. When [[object]]s with these [[colour]]s are [[mixture|mixed]] the [[object]] will preferentially [[Absorb (Physics)|absorb]] certain [[frequency|frequencies]] of [[light]] allowing only certain [[colour]]s to be [[reflect]]ed.