Reflection - When a light ray hits a mirror surface and is bounced back outwards again, Rainbow - this happens when white light from the sun is refracted through raindrops in the atmosphere, Prism - A clear, colourless material that bends (refracts) light rays as they pass through., Visible light - The tiny part of the electromagnetic spectrum of radiation that our eyes and brain can detect., ROGBIV - The order of the colours of light in the visible spectrum, Ultraviolet - A colour of light that our eyes can not see., Convex lens - a lens with one or two outwardly curved surfaces. They make light rays converge and focus to a point, Concave lens - A lens with one or two inwardly curved surfaces. The diverge the light rays outwards.,

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