Describe various modes of vibration of air column in a closed pipe. Show that a closed pipe can produce only odd harmonics (b). What are beats ?.Discuss the formation of Beats graphically.
The various modes of vibration of air column are:
The air at the closed end is not free to vibrate so a node is formed at the closed end. While the air at the open end is free to vibrate with maximum amplitude so an antinode is formed at this end.The simplist mode is this one and it iscalled the fundamental mode.
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