Every object has a natural resonant frequency: the speed it will vibrate if bumped. Wine glasses are especially resonant because of their shape.
In the case of the glass we are trying to shatter, the body of the glass vibrates at resonance. If the force making the glass vibrate is big enough, the size of the vibration will become so large that the glass breaks.
And according to physics, it should be possible. It all comes down to a phenomenon known as resonance.The cracks can be small enough that they are not visible to the naked eye, but without these, the glasses don’t break
When sound hits an object – such as a champagne flute – it excites the particles inside, causing them to vibrate.