The waves in which matter moves at right angles to the direction of the wave are called transverse waves.

Here's why:

* Transverse Waves: In these waves, the particles of the medium oscillate perpendicularly to the direction the wave travels. Imagine shaking a rope up and down. The wave travels horizontally along the rope, but the rope particles move vertically.

* Examples of Transverse Waves: Light waves, electromagnetic waves, and waves on a stretched string are all examples of transverse waves.

Let me know if you'd like more information about waves!