Answer:
When frequency of a vibrating body matches with natural frequency of other body,resonance takes place that is why army troops are asked to break their steps while crossing the bridge and glass of window pane get broken when a body like aeroplane passes near to it actually what happens the natural frequency of aeroplane matches with glass panes..
First answer by Vishal Suryavanshi. Last edit by Vishal Suryavanshi. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 5 [recommend question].

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