A point in space where wave amplitude is zero is called a node.

Here's a breakdown:

* Wave Amplitude: The maximum displacement of a wave from its equilibrium position.

* Node: A point where the amplitude of a wave is always zero.

Types of Nodes:

* Standing Waves: In standing waves, nodes are points of zero displacement that remain stationary. These are often found in situations like vibrating strings or sound waves in a closed tube.

* Interference: When two waves superimpose, they can create interference patterns with nodes where the waves destructively interfere, cancelling each other out.

Let me know if you'd like to explore any of these concepts in more detail!