Light and Colour

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The human eye has four kinds of sensors: rods, which detect black and white; a cone for red; a cone for green; and a cone for blue. Our perception of colour relies on these sensors.

White light is made up of all the colours of the visible light spectrum. This can be seen when a beam of white light is refracted by a prism. Apparently, Newton had a lot to say about this, as he was the first to prove that white light is made of the rest of the visible light spectrum. More on this once I've had a better look at Opticks. Goethe also had a lot to say about the physics of light and colour perception. Again, more once I've read Theory of Colours.

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