What frequency does a wine glass break?

It's not that a wine glass breaks at a specific frequency, but rather that it has a resonant frequency. This is the frequency at which the glass vibrates most easily and with the greatest amplitude.

Here's how it works:

* Every object has a natural frequency at which it vibrates. This is determined by its shape, size, and material.

* When sound waves match the object's resonant frequency, the object will absorb energy from those waves and vibrate more intensely.

* For a wine glass, the resonant frequency is usually in the audible range, somewhere between 400 and 1000 Hz. This is why you can break a wine glass by singing a note at the right pitch.

Important Note: It's not just about hitting the exact resonant frequency. The amount of energy transferred to the glass is also crucial. A gentle hum won't break a glass, but a powerful, sustained note can.

So, to answer your question directly: There's no single frequency that will break all wine glasses. It depends on the glass's specific properties and the energy of the sound wave.