Some opera singers are able to use their voice to shatter a crystal glass. Which of the phenomenon is used to explain this ?

Acoustic reflection

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Multiple echoes

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Interference

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Resonance

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Beats

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Solution

The correct option is D Resonance
When the external frequency becomes equal to the natural frequency of the body , then the amplitude of vibrations of the body becomes very large , this phenomenon is called resonance .
When a opera singer manages his frequency such that it becomes equal to the natural frequency of crystal glass , resonance occurs and glass shatters.

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