Refraction - When waves change direction, Frequency - This is measured in Hertz, Longitudinal - Sound waves are an example of this type of wave, Transverse - Light is an example of this type of wave, Diverging - Short sightedness is corrected using this type of lens, Convex - A converging lens is also known as a BLANK lens, Retina - The light sensitive part of the eye, Spectular - The type of reflection when light reflects off a smooth surface,

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