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  • Smart Learning for All

  • Topic: Resonance.

  • How does sound break glass?

  • Obviously, using a hammer.

  • No.

  • It is because of resonance.

  • I know.

  • Resonance means to keep calm and balance.

  • No.

  • Wait, I will explain.

  • Every object when struck vibrates at its natural frequency.

  • If we make sound having a frequency which matches the object's natural frequency.

  • Then that object starts to vibrate.

  • This phenomenon is called resonance.

  • So, this was the reason why my legs started to move when the music system was switched on.

  • Just listen.

  • Every glass is made up of different materials.

  • However, all of them have a natural resonant frequency.

  • Hence, when we make sounds which match their resonant frequencies, the glasses start to vibrate.

  • As glass is a brittle material, louder the sound.

  • More violently will it vibrate causing the glass to shatter into pieces.

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