APFIVE Standing Wave Harmonics in a Closed Tube
A standing wave is established in a tube of length L that is closed at one end and open at the other. Which of the following expressions correctly describes the possible wavelengths, λₙ, of the harmonics that can form in the tube?
A
λₙ = 4L/n where n = 1, 2, 3, …
B
λₙ = 2L/n where n = 1, 2, 3, …
C
λₙ = 2L/(2n-1) where n = 1, 2, 3, …
D
λₙ = 4L/(2n-1) where n = 1, 2, 3, …
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