Question

shaow that only odd harmonics are present as a overtone in the vibration of an air column in at one end​

Answer 1

Answer:

In the second mode of vibration of the air column, two nodes and two antinodes are formed. ... Thus, we see that the frequencies of the modes of vibrations are in the ratio n:n1:n2 = 1:3:5. This shows that only odd harmonics are present in the modes of vibrations of the air column closed at one end.