Show the wavelength of vibrations in air in a closed tube by depositing lycopodium powder at the nodes.
- Glass tube approximately 80cm long x 32cm Ø
- One end is a tightly fitting but adjustable cork piston fitted to a metal rod 100cm long
- Opposite end is a loose fitting piston attached to a sounding rod 100cm long x 8mm Ø
- Closed length 1890mm