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Andrew Lambert Photography
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Standing waves in a cup of coffee. A standing wave, also known as a stationary wave, is a wave that remains in a constant position. If the medium (here the coffee) is not moving with respect to the wave, then the standing wave is a result of interference between two waves travelling in opposite directions, in this case circular waves reflecting from the edges of the cup and the centre of the cup.
May 14th, 2013
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