3.26 understand that sound waves are longitudinal waves and how they can be reflected, refracted and diffracted

3.26 understand that sound waves are longitudinal waves and how they can be reflected, refracted and diffracted

Sound waves are longitudinal waves. Like other waves they can also be reflected refracted and diffracted. Sound waves reflect when they bounce back from a surface so that the angle of incident is equal to the angle of reflection. A reflected sound wave is called an echo. Sound waves refract when it changes direction while travelling across a high dense medium. Sound waves are diffracted when they spread while travelling through a narrow space such as doorway.