Longitudinal waves are those in which -

Explanation:

Wave motion: The type of disturbance that travels through a medium due to repeated vibrations of the particles of the medium about their mean positions is called wave motion.

There are two types of wave motion:

Longitudinal wave motion: It is that wave motion in which individual particles of the medium execute simple harmonic motion about their mean position along the same direction, in which the wave is propagated.

• For example: Sound waves

Transverse wave motion: Vibration of particles in a medium and the propagation of wave are perpendicular to each other.

• Example: Waves in the surface of the water, waves in a string, light waves, etc.