Question

Assertion: Oscillation of an air column with one end closed and the other open. A glass tube partially filled with water illustrates this system. The end in contact with water is a node, while the open end is an antinode. Reason: At the node the pressure changes are the largest, while the displacement is minimum (zero). At the open end - the antinode, it is just the other way - least pressure change and maximum amplitude of displacement.

An organ pipe produces a fundamental frequency 128 Hz. When blown forcefully, it produces first overtone of 384 Hz. Is the pipe open or closed?