Here's why:

* Transverse waves are waves where the particles of the medium move perpendicular (at right angles) to the direction the wave travels. Think of a wave in a rope: you move the rope up and down, but the wave travels horizontally.

* Examples of transverse waves:

* Light waves

* Radio waves

* Seismic S-waves (these are a type of earthquake wave)

Let me know if you'd like more explanation on any of these concepts!