3D30.24 Organ Pipe with Node

PURPOSE: To show that an organ pipe has a lower frequency when a node is forced at the mid point of the pipe.

DESCRIPTION: An organ pipe has a slider in the middle, as shown in the above photos.  When the slider is pulled out there is an anti-node at the mid point of the pipe and the frequency is higher.  When the slider is pushed in a node is forced at the middle and the frequency is lower.

References:

Neville H. Fletcher and Suszanne Thwaites, The Physics of Organ Pipes, Scientific American, 94-103,
(Jan. 1983).

Derwent M. A. Mercer, The Physics of the Organ Flue Pipe, AJP 21, 376-386, (1953).  

W.H. Barnes, The Contemporary American Organ Pipe. (1948).

EQUIPMENT:  Organ pipes, as photographed.

SETUP NOTES: None.