H3-22.HTML
H3-22: RESONANCE TUBE - OSCILLATOR AND PLUNGER

PURPOSE: To demonstrate standing waves in a closed tube.

DESCRIPTION: An air column in a tube is excited by an oscillator and loudspeaker at one end of the tube and stopped with a plunger at the other end. Vary the frequency of the oscillator or the position of the plunger to obtain the resonance, which can be easily heard. Because this is a closed tube, resonances exist at odd multiples of one-quarter wavelength. Using this device standing waves can be demonstrated, the wavelength of a sound wave shown, and the speed of sound determined.

SUGGESTIONS:

REFERENCES: (PIRA 3D10.330)

EQUIPMENT: Oscillator, microphone, and pre-assembled tube with plunger and scale.

SETUP TIME: 5 min.


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