Which of the following diagrams correctly illustrates the mode of oscillation of air in a tube for the first overtone?
( The diagrams above are meant to help you in answering this question)
A.
A
B.
B
C.
C
D.
D
Correct answer is B
The diagram above is a full wavelength and the length of an open pipe during first overtone equals one wavelength i.e. l = λ