The wavelength in , where is the frequency in and is the speed of sound in .Originally Posted bybabygirl

For a air column closed at one end and open at the other; at resonance you

have a node at the closed end and an anti-node at the open end, so the

length for the lowest resonance is a quarter wavelength, the next resonance

is three quarters of a wavelength, and the third is at one and a quarter wavelengths.

So pluging in the numbers:

,

so the required lengths are .

RonL