The waves that occur when the motion of the medium is at right angles (perpendicular) to the direction of the wave are called transverse waves.

Here's a breakdown:

* Transverse waves: The particles of the medium move perpendicular to the direction the wave travels. Think of a wave on a string: the string moves up and down (perpendicular to the wave's direction), while the wave itself travels horizontally.

Here are some examples of transverse waves:

* Light waves: Light waves are electromagnetic waves, meaning they don't require a medium to travel. However, they exhibit transverse wave behavior.

* Waves on a string: A string vibrating creates a transverse wave as the string moves up and down, while the wave travels along the string's length.

* Water waves: While water waves have a bit of a longitudinal component, they are primarily transverse. The water molecules move in a circular motion as the wave passes, with the peak of the circle being perpendicular to the wave's direction of travel.

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