Glass tube for demonstrating standing sound waves and calculating wavelengths of sound using cork powder in a method devised by Kundt.
Cork powder is spread evenly throughout the tube by means of a filler chute. Then a sound source, e.g. a whistle, a 1700 Hz tuning fork (U10115) or a horn speaker (U8432680), is used to excite the powder into a regular pattern of nodes and antinodes. The effective length of the tube can be altered by means of a piston.
![Kundt's Tube, 1000814 [U8432845], Sound](/imagelibrary/U8432845/U8432845_01_Kundts-Tube.jpg)
![Kundt's Tube, 1000814 [U8432845], Sound](/imagelibrary/U8432845/U8432845_02_Kundts-Tube.jpg)
![Kundt's Tube, 1000814 [U8432845], Sound](/thumblibrary/U8432845/U8432845_01_1200_1200_Kundts-Tube.jpg)
![Kundt's Tube, 1000814 [U8432845], Sound (Small)](/thumblibrary/U8432845/U8432845_02_1200_1200_Kundts-Tube.jpg)
![Stand for Cylindrical Coils, 1000964 [U8496150], Magnetic Fields](/thumblibrary/U8496150/U8496150_01_140_140_Stand-for-Cylindrical-Coils.jpg)
![Cork Powder, 10 g, 1000815 [U8432850], Sound](/thumblibrary/U8432850/U8432850_01_140_140_Cork-Powder-10-g.jpg)
![Graduated Ruler, 1 m, 1000742 [U8401550], Measurement of Length](/thumblibrary/U8401550/U8401550_01_140_140_Graduated-Ruler-1-m.jpg)
![Light Metal Tuning Fork, 1700 Hz, 1002607 [U10115], Tuning Forks](/thumblibrary/U10115/U10115_01_140_140_Light-Metal-Tuning-Fork-1700-Hz.jpg)
![Horn Loudspeaker, 1000811 [U8432680], Sound](/thumblibrary/U8432680/U8432680_01_140_140_Horn-Loudspeaker.jpg)
![Vibration generator -
for investigating oscillations and resonances, 1000701 [U56001], Oscillations](/thumblibrary/U56001/U56001_01_140_140_Vibration-generator-for-investigating-oscillations-and-resonances.jpg)
![Accessories Chladni Plate, square -
for the Vibration Generator, 1000706 [U56006], Oscillations](/thumblibrary/U56006/U56006_01_140_140_Accessories-Chladni-Plate-square-for-the-Vibration-Generator.jpg)
![Accessories for Standing Waves -
for the Vibration Generator, 1000702 [U56002], Mechanical Waves](/thumblibrary/U56002/U56002_01_140_140_Accessories-for-Standing-Waves-for-the-Vibration-Generator.jpg)
![Tuning Fork 21 Hz with Plotter Pen, 1000805 [U8431030], Tuning Forks](/thumblibrary/U8431030/U8431030_01_140_140_Tuning-Fork-21-Hz-with-Plotter-Pen.jpg)
![Tuning Forks Kit (440 Hz), 1002612 [U10120], Tuning Forks](/thumblibrary/U10120/U10120_01_140_140_Tuning-Forks-Kit-440-Hz.jpg)
![Helical Spring Snakey, 1008687 [U30034], Mechanical Waves](/thumblibrary/U30034/U30034_01_140_140_Helical-Spring-Snakey.jpg)
![Accessories for Spring Oscillations -
for the Vibration Generator, 1000703 [U56003], Mechanical Waves](/thumblibrary/U56003/U56003_01_140_140_Accessories-for-Spring-Oscillations-for-the-Vibration-Generator.jpg)
![Accessories for Resonance and Vibration Nodes -
for the Vibration Generator, 1000707 [U56007], Mechanical Waves](/thumblibrary/U56007/U56007_01_140_140_Accessories-for-Resonance-and-Vibration-Nodes-for-the-Vibration-Generator.jpg)
![Coil Spring Slinky, 1003516 [U8405830], Coil Springs](/thumblibrary/U8405830/U8405830_01_140_140_Coil-Spring-Slinky.jpg)
![Accessories Chladni Plate, circular -
for the Vibration Generator, 1000705 [U56005], Oscillations](/thumblibrary/U56005/U56005_01_140_140_Accessories-Chladni-Plate-circular-for-the-Vibration-Generator.jpg)
![Universal Clamp, 1002830 [U13255], Clamps](/thumblibrary/U13255/U13255_01_140_140_Universal-Clamp.jpg)
![Diaphragm with 4 Double Slits of Different Spacings, 1000597 [U14101], Apertures, Diffraction Elements and Filters](/thumblibrary/U14101/U14101_01_140_140_Diaphragm-with-4-Double-Slits-of-Different-Spacings.jpg)
![Microwave Set 9.4 GHz (230 V, 50/60 Hz), 1009951 [U8493600-230], Wave Optics](/thumblibrary/U8493600-230/U8493600-230_01_140_140_Microwave-Set-94-GHz-230-V-5060-Hz.jpg)
![Function Generator FG 100 (230 V, 50/60 Hz), 1009957 [U8533600-230], Function Generators](/thumblibrary/U8533600-230/U8533600-230_01_140_140_Function-Generator-FG-100-230-V-5060-Hz.jpg)
![Accessories for Rope Waves -
for the Vibration Generator, 1008540 [U85560081], Mechanical Waves](/thumblibrary/U85560081/U85560081_01_140_140_Accessories-for-Rope-Waves-for-the-Vibration-Generator.jpg)
![Precision Dynamometer 2 N, 1003105 [U20033], Dynamometers](/thumblibrary/U20033/U20033_01_140_140_Precision-Dynamometer-2-N.jpg)
![Precision Dynamometer 5 N, 1003106 [U20034], Dynamometers](/thumblibrary/U20034/U20034_01_140_140_Precision-Dynamometer-5-N.jpg)