Explain-:
1. why are soldiers asked to walk out of step while crossing bridges?
2.why dies a vine glass start rattling when a note of some particular frequency is struck by a piano?
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Hey there!
(1) When the soldiers walk in step, they produce some fixed frequency. If this frequency corresponds to the natural frequency of the bridge, resonance can takes place. This will make the bridge vibrate violently, and hence it may collapse. To avoid such a situation, the soldiers are asked not to march in step.
(2) When the glass rattles, at that moment, its natural frequency corresponds with the frequency with which the piano is being played. Thus, resonance takes place, which makes the glass to vibrate violently.
:-)
(1) When the soldiers walk in step, they produce some fixed frequency. If this frequency corresponds to the natural frequency of the bridge, resonance can takes place. This will make the bridge vibrate violently, and hence it may collapse. To avoid such a situation, the soldiers are asked not to march in step.
(2) When the glass rattles, at that moment, its natural frequency corresponds with the frequency with which the piano is being played. Thus, resonance takes place, which makes the glass to vibrate violently.
:-)
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