Visual perception, light and colour
- The human eye and so human visual perception are tuned to the visible spectrum and so to colours between red and violet. Light, however, is rarely of a single wavelength, so an observer will usually be exposed to a range of different wavelengths of light or a mixture of wavelengths from different areas of the spectrum.
- There are no properties of electromagnetic radiation that distinguish visible light from other parts of the electromagnetic spectrum.
- Visual perception is associated with eyesight but also usually refers to the brain’s ability to make sense of what our eyes see.
- The human eye and so human vision are tuned and respond to the visible part of the electromagnetic spectrum.
- Colour is not a property of electromagnetic radiation, but a feature of the visual perception of an observer.
- Colour is what human beings see in the presence of light.
- Objects appear to be different colours to an observer depending on the wavelengths, frequencies and intensity of light at the moment it strikes the retina at the back of the eye.