concave (diverging) lens, a lens that spreads beams of light out, used in spy holes, convex (converging) lens, a lens that brings a beam of light to a focus, used in the eyes and cameras, diffuse (scattering), the reflection of light from a rough surface, light is scattered in all directions, dispersion, the separation of the colours in white light into a continuous spectrum, focal length, the distance from the centre of a lens to the principal focus (focal point), inverted (of an image), upside down, prism, a triangular-shaped piece of glass used to produce a spectrum, ray diagram, a diagram that uses rays to model what happens to beams of light, real image, an image that you can put on a screen, short sight, an inability to see distant objects, virtual image, an image produced by a mirror that appears to be present, but which cannot be seen on a screen
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P5.3 Wave Interaction
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Rowena14
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