Longest Wavelengths in 128 cm Tube: Open at Both/One End

[spokorne]

Homework Statement

What are the three longest wavelengths for standing sound waves in a 128-cm-long tube that is (a) open at both ends and (b) open at one end, closed at the other?

Homework Equations

W=V/F

The Attempt at a Solution

128 cm because nothing bigger could fit in the tube

 

[rl.bhat]

In the fundamental mode of vibration, the wavelength in open pipe is λ/2 and in closed pipe λ/4.