Physics

Does ‘colour’ exist?

Is there such thing as colour, as colour is only light?

Yes, obviously colour exists – we talk about it every day!

It tells us whether food is safe or ripe to eat, it makes things attractive or repulsive, it controls traffic, camouflages us or makes us stand out in a crowd…  Colour is our qualitative take on just one octave of the (almost) infinite electromagnetic spectrum – it’s a human perception, in the same way that smell and sound are.

So perhaps the answer to this question is philosophical like the answer to the question – “If no one is present to hear a tree fall, does it make a sound?”