What waves of disturbance is perpendicular to the direction the waves travel?

Transverse waves are disturbances in which the wave motion is perpendicular to the direction in which the waves travel. This means that the particles of the medium move up and down (or side to side) as the wave passes by, creating crests and troughs in the wave pattern. Examples of transverse waves include electromagnetic waves like light and radio waves, as well as seismic S-waves in earthquakes.