There are many physical phenomena that can be modelled by sine waves:<br>
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Waves in water are an obvious example,<br>
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Compression and rarefaction in the propagation of <br>
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sound,<br>
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Transmission of all electromagnetic radiation,<br>
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Vibrations of strings in Musical Instruments,<br>
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Bodies "bouncing" on a spring.<br>
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Also, more complicated motion can be modelled by a superposition of many sine waves (using Fourier transforms).<br>
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This enables complex motions to be studied more easily.<br>
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There are many physical