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→Key Stage 3
| style="height:20px; width:200px; text-align:center;" |A blue [[object]] [[reflection|reflects]] blue [[light]] but [[Absorb (physics)|absorbs]] all the others '''colours'''.
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===Eyes and Colour===
: The [[human]] [[eyes]] only have three different '''colour''' sensing [[Cell (Biology)|cells]] called [[Cone (Biology)|cones]]. They can detect; red, green or blue light. All other '''colours''' we see are caused by a pair of different [[Cone (Biology)|cones]] detecting [[light]] at the same time.
: If the red [[Cone (Biology)|cones]] and blue [[Cone (Biology)|cones]] both detect [[light]] then we see [[magenta]].
: If the red [[Cone (Biology)|cones]] and green [[Cone (Biology)|cones]] both detect [[light]] then we see [[yellow]].
: If the blue [[Cone (Biology)|cones]] and green [[Cone (Biology)|cones]] both detect [[light]] then we see [[cyan]].