| Definition: | process in which an incident wave, meeting a surface separating two different media, gives rise to another wave called a reflected wave, which propagates away from the surface in the same medium as the incident wave and is interpretable by geometrical optics
Note 1 to entry: According to the degree of fulfilment of certain geometrical optics conditions, the reflection can be considered as a regular reflection or a diffuse reflection.
Note 2 to entry: The reflected wave can return partially or totally into the medium from which it originated.
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