15:52 Nov 10, 2011 |
English language (monolingual) [PRO] Science - Physics | |||||||
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| Selected response from: DLyons Ireland Local time: 15:25 | ||||||
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SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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3 | "longitudinal plane wave" |
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"longitudinal plane wave" Explanation: This sounds better to me but both are used frequently. |
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