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