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On this page, there's an animated diagram (aptly done in shockwave) about
normal shockwave formations:- http://selair.selkirk.bc.ca/aerodyna...ed/Page2c.html Something confuses me though. As diagrammed, the red pressure wave at the rear has a low frequency at the front and a high frequency at the back. Why would this happen (if indeed it does)? Why is the frequency HIGHER in the direction that the airflow is moving? Thanks in advance. |
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