Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves.
When sound travels in a given medium, it strikes the surface of another medium and bounces back in some other direction, this phenomenon is called the reflection of sound. The waves are called the incident and reflected sound waves.
First Law of Reflection: The incident wave, the reflected wave, and the normal at the point of incidence lie on the same plane.
Second Law of Reflection: The angle of incidence is equal to the angle of reflection.