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H3-22: RESONANCE TUBE - OSCILLATOR AND PLUNGER 9 years 8 months ago #828

  • zzfixk23
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ID Code: H3-22
Purpose: 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.
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