Here's a more detailed explanation:

* Crest: The highest point of a wave.

* Trough: The lowest point of a wave.

* Amplitude: The vertical distance from the equilibrium position (the midpoint between the crest and trough) to either the crest or the trough.

Therefore, Amplitude = (Crest - Trough) / 2

It's important to note that amplitude is a measure of the wave's intensity or strength. A wave with a larger amplitude carries more energy.