PASCO WA-9867 Sine Wave Generator - Manual (Page 30)

Sine Wave Generator Teachers’ Notes–Resonance Tubes
30 ®
Part II
f
1
= 122 Hz (fundamental)
λ = (346 m/s)/(122 Hz) = 2.84 m
L = 1/2
λ = 1.42 m (effective length)
Actual Tube Length = 1.31 m
End effect (per end) = (1.42 m-1.31 m)/2 = 5.5 cm, which is between the values from Part I.
1st Harmonic
3rd Harmonic
3rd Harmonic