Measure the frequency and wavelength of the tone generated by a tuning fork or audio oscillator driven speaker with this simple device. It consists of a 91cm long acrylic tube with a diameter of 1.2cm, a sliding piston mounted on a wood dowel to vary the length of the air column in the tube, two steel supports and instructions. Requires sound source.
WARNING: CHOKING HAZARD–Small parts. Not for children under 3 yrs
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