Why doesn't magenta appear in the rainbow? The answer lies not in physics but in biology.
Science
presenter Steve Mould demonstrates the strange phenomenon of colour
mixing, in which not everything is as it seems. The cone cells within
our eyes are responsible for the colours we see, but are only sensitive
to Red, Green and Blue light. So how are we able to see so many colours
when we can only directly detect three and how do our brains see the
colour magenta which doesn't have a wavelength?
Steve explains all with the help of his coloured torches and explores how everyday technology fools our brains into seeing more.
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