what is the difference between crests and rarefactions ,troughs and compression ?

Asked by  | 9th Dec, 2013, 09:15: PM

Expert Answer:

When the wave is moving through air, the air is being compressed at the wave crest and the air is being rarefacted on the trough. 
Crests represent maximum amplitude of a wave, which is analogous to compression which represent maximum density regions.
Troughs represent minimum amplitude , which is analogous to rarefactions which are low density regions.
So, the comparision between crest/troughs and compression/rarefractions is made between the amplitude (intensity) to the density (pressure).

Answered by Komal Parmar | 10th Dec, 2013, 07:14: AM

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