The third overtone of a closed organ pipe is equal to the second harmonic of an open organ pipe. Then the ratio of their lengths is equal to The third overtone of a closed organ pipe is equal to the second harmonic of an open organ pipe. Then the ratio of their lengths is equal to November 1, 2020 Category: Arihant Physics by D.C Pandey , Chapter 16 - Waves , Volume 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related