Brewster Angle Determination - Amrita University

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When light moves between two media of differing refractive index (n), some of the light is reflected from the surface of the denser material. This reflected ray's intensity changes with changes in the incident angle (θi) of light on the new medium. At one particular angle of incidence light with a particular polarization is not reflected at all. This loss in light intensity is due to polarization by reflection and the angle of incidence for which there is no reflected ray is called the Brewster's angle θB (also known as the Polarization angle).