SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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speeded up before reaching the glass
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amplified before reaching the glass
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reflected off the glass
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able to vibrate the glass
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Detailed explanation-1: -Answer and Explanation: An opera singer shattering a glass with her voice is an example of resonance. Each object has its frequency with that frequency each object vibrates.
Detailed explanation-2: -This common phenomenon is known as resonance and occurs because the singer’s voice displaces nearby air particles, which crash into the glass like invisible waves. And when the singer’s voice is amplified, these waves get more powerful. With enough amplification, the glass can vibrate so strongly that it shatters.
Detailed explanation-3: -How can a certain note sung by an opera singer cause a crystal glass to shatter? If the singer sings a note equal to the natural or resonant frequency of the glass, the glass will vibrate at a higher amplitude, shaking the glass until it shatters.
Detailed explanation-4: -As you heard in the video above, the singer has to be very loud – an ear-splitting intensity of at least 105 decibels, according to Jaime Vendera, a vocal coach who demonstrated his technique for the Discovery Channel in 2005.