An interesting thought from a nature programme on the BBC last night. The reason that plants appear green to us is because they absorb the red and blue photons in the light spectrum and reject/reflect the green ones. So basically, the colour they appear to be is the very colour in the light spectrum they haven’t absorbed – the colour they’re not. Musing on this point raises questions about the nature of perception and whether we can trust our senses: potentially everything we see is actually the opposite of what it appears to be… or simply not what it appears to be.
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