Wd-4 Resonance Smashing of a Wine Glass
Aim
To smash a wine glass using sound waves at the resonant frequency.
Apparatus
- Signal generator
- Horn loudspeaker
- P.A. Amplifier
- Stand and cabinet
- Wine glass
- Laser
- Mirror
Wine Glass Resonance Apparatus.
Description
A clean wine glass is positioned a few centimetres from the horn loudspeaker in the cabinet shown above. A light mirror rests against the rim and acts as a detector of resonance. The frequency of the signal generator is swept slowly through the 600Hz to 1600Hz range until resonance is indicated by a circular Lissajous figure projected on the screen. At this point the amplifier output is increased whereby the glass will explode under the action of the rim oscillations.