Explain why (or how): in a sound wave, a displacement node is a p… - Vidyadip

Question

Explain why (or how):
in a sound wave, a displacement node is a pressure antinode and vice versa,

✓

Answer

A node (N) is a point where the amplitude of vibration is the minimum and pressure is the maximum.
An antinode (A) is a point where the amplitude of vibration is the maximum and pressure is the minimum.
Therefore, a displacement node is nothing but a pressure antinode, and vice versa.

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