Physics- reflection

Jun 17th, 2015
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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.

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Reflection The reflection ofMount HoodinTrillium Lake.Reflectionis the change in direction of a wavefrontat an interface between two differentmediaso that the wavefront returns into the medium from which it originated. Common examples include the reflection oflight,soundandwater waves. Thelaw of reflectionsays that forspecular reflectionthe angle at which the wave is incident on the surface equals the angle at which it is reflected.Mirrorsexhibit specular reflection.Inacoustics, reflection causesechoesand is used insonar. In geology, it is important in the study ofseismic waves. Reflection is observed withsurface wavesin bodies of water. Reflection is observed with many types ofelectromagnetic wave, besidesvisible light. Reflection ofVHFand higher frequencies is important forradiotransmission and forradar. Evenhard X-raysandgamma rayscan be reflected at shallow angles with special "grazing" mirrors.Reflection of lightDouble reflection: The sun is reflected in the water, which is reflected in the paddle.Reflection of light is eitherspecular(mirror-like) ordiffuse(retaining theenergy, but losing the image) depending on the nature of the interface. Furthermore, if the interface is between a dielectric and a conductor, thephaseof the reflected wave is retained, otherwise if the interface is between two dielectrics, the phase may be retained or inverted, depending on theindic

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