Plunger for Resonance Tubes

A plunger for use with, and to alter the length of, Lascells Resonance Tubes. This allows investigation of the maths behind standing waves in a closed tube ( f = nv / 4L  where n = 1, 3, 5 etc.), when used in conjunction with resonance tubes.

Please note: Awaiting photo- Image shows Amplified Resonance Tube only.