The wave can be defined as the disturbance traveling in a medium due to the vibratory motion of medium by virtue of elasticity and inertia.

Types of waves:

Transverse waves:- In these waves, the particles of medium vibrate perpendicular to the direction of propagation of waves.

Longitudinal waves:- In these waves, the particles of medium vibrate parallel or anti parallel to the direction of propagation of waves.

Another classifications:

Progressive or Traveling:- If there is a continuous transfer of energy in one direction across any cross-section of the medium, the waves are called progressive or traveling.

Stationary or Standing:- If the net transfer of energy across any cross-section of the medium is zero, the waves are called stationary or standing waves.