Kundt`s Tube

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Kundts Tube

• TMF
• Gymnasium Elišky Krásnohorské

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Scheme of the experiment
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Primary structure

• if Kundts tube is tuned, in tube rises standing
  wave
• (primary at frequency of sound generator)

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Secondary structure

• if proportion of length of tube and radius of
  tube is small, secondary standing wave rises on
  higher harmonic in tube

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Properties of the second structure

• the distance beetwen minum and maximum is
  fundamentally smaller then in primary structure
• it isnt stable unideal bounce waves on a tube
  bottom causes a wave motion of secondary
  structure
• it is stronger then primary structure
• it is sensitive on tuning the Kundts tube
• it takes cca 2 - 4 mm in our measurement

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Foto of the secondary structure