Here's a breakdown:
* Rest Position: The undisturbed state of the medium where the wave is traveling.
* Displacement: The distance a point on the medium moves from its rest position as the wave passes through.
* Amplitude: The maximum displacement, either positive or negative, from the rest position.
Think of a wave on a string:
* The string is at rest when it's flat.
* When a wave travels along it, parts of the string move up and down.
* The highest point the string reaches above the rest position is the amplitude.
The amplitude is a key characteristic of a wave, determining its energy and intensity.
