The bending of a wave that occurs at the interface between two media. It occurs when the wave speed changes. either because it is passing from one medium to another or by changes in the physical properties of the medium, e.g., a temperature or wind gradient in the air when applied to acoustics.

Angle of Refraction (or Angle of Deviation)

The angle at which a refracted ray of energy leaves the interface at which the refraction occurred, measured between the direction of the refracted ray and perpendicular to the interface at the point of refraction.

See also: Absorptive Index, Acoustic Refraction, Birefringence, Diffraction, Diffuse Reflection, Refractive Index.

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Acoustics and Vibrations Animations A collection of animations produced by Daniel A. Russell, Ph.D., Associate Professor of Applied Physics at Kettering University.