... reflected when lights hits an object, and which are absorbed, not what colour the object is. We cannot see many different wavelengths, and which we can see is based primarily on the photoreceptors that we have. Although some animals have the ability to see in the infra-red, and on first glance, this would seem to be a highly valuable skill, because of our warm blood, this would merely result in us only seeing the glow from our own blood (Bowmaker, 1983). Colour vision relies on us possessing these photoreceptors in our retinas, otherwise known as 'cones', that have sensitivity to certain wavelengths along the visual spectrum. A photoreceptor that responds most to a wavelength of 550-570nm, for example would be able to detect a yellowy-green colour. The sensitivity of this receptor peaks at 560nm, yet the further away the wavelength from this peak, the less efficient this receptor will be at ...

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