Physics of vision

Physics of vision

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Credit: MARK GARLICK/SCIENCE PHOTO LIBRARY

Caption: Physics of vision. Artwork of a human eye and the spectrum of visible light (far left). Visible light is a small part of the range or spectrum of electromagnetic radiation, between infrared (heat) radiation and ultraviolet (UV) radiation. Visible light is the part of this spectrum sensed by human eyes. An eye detects the amount of light and the light's colour. The colour is due to a property of light called wavelength that is related to energy. Visible light varies from red (long wavelength, low energy) through orange, yellow, green and blue to violet (short wavelength, high energy). Visible light's wavelength ranges from 700-400 nanometres.

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Keywords: anatomy, artwork, colour, colours, electromagnetic, eye, eyeball, eyeballs, eyes, human body, illustration, iris, light, physics, pupil, radiation, sight, spectral, spectrum, visible, vision, visual sense, wave, waves

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