PURPOSE: To illustrate resonance in an air column.
DESCRIPTION: Strike either tuning fork and hold it to the end of the tube. The sound intensity of the fork at the resonant frequency of the tube increases dramatically, whereas the fork with the non-resonant frequency does not become significantly louder. The second harmonic of the tube is excited.
REFERENCES: (PIRA unavailable.)
EQUIPMENT: Plastic tube with resonant and non-resonant tuning forks.
SETUP TIME: None.
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