Kundt'S Tube - Stroked Rod

Purpose

To demonstrate standing waves in an air column.

Equipment

Kundt's tube with cork dust and rosin cloth.

Images

h3-04

Description

This is the classical Kundt's tube standing wave apparatus. A rag covered with violin rosin is used to stroke an aluminum rod which excites standing waves in the air tube. Cork dust in the tube is agitated by the standing wave and deposited on the bottom of the tube such that it shows the basic form of the pattern of air motion. For this system the wavelength is about 11 cm, or one loop about 5.5 cm.◙

References

Apparatus Description, 84865 KUNDT'S Apparatus, Cenco Scientific Co. ◙Apparatus Description, 3302 KUNDT'S Apparatus, Cenco Scientific Co.