Here's why:
* Transverse Wave: In a transverse wave, the particles of the medium vibrate perpendicular to the direction the wave travels. Think of a rope tied to a wall. If you shake the rope up and down, the wave will travel horizontally along the rope, but the individual particles of the rope will move up and down.
* Direction of Vibration vs. Wave Motion: The direction of the particle vibrations is *transverse* (at a right angle) to the direction the wave travels.
Examples of Transverse Waves:
* Light waves
* Waves on a string
* Electromagnetic waves
Let me know if you'd like to learn more about transverse waves or other types of waves!