Quick Answer: The Resonance Apparatus is a resonance column for finding the speed of sound in air, with a transparent tube, a millimetre scale and a height-adjustable water reservoir on a powder-coated metal stand. Moving the reservoir changes the water level and so the length of the air column.
Last updated: October 2026
Key Features
Transparent resonance tube with millimetre scale for reading the water level
Reservoir with adjustable vertical height and flexible, leak-proof coupling
Powder-coated metal stand
Cast iron base with levelling screws
Technical Specifications
Specification
Value
Scale
Millimetre graduations
Reservoir
Adjustable height, flexible leak-proof coupling
Stand
Powder-coated metal
Base
Cast iron, levelling screws
About This Product
A tuned vibration source is held over the open tube while the water level is lowered until the air column resonates. Measuring the resonance lengths lets students study longitudinal stationary waves and calculate the speed of sound in air.