Here's why:
* Transverse waves are waves where the displacement of the medium is perpendicular to the direction the wave travels. Think of a wave on a string – the string moves up and down (perpendicular) while the wave travels along the string.
* Amplitude is the maximum displacement of a point on the medium from its rest position. It's essentially the "height" of the wave, which is a direct measure of how far the medium is displaced from its equilibrium.
In summary: Amplitude quantifies the extent of the displacement in a transverse wave.
