Brewster Angle

The Brewster angle is the specific angle at which light hitting a surface causes no reflected light to be polarized horizontally. When light encounters a boundary between two materials, some reflects, and some passes through. At this particular angle, the reflected light becomes polarized vertically, meaning its electric waves are aligned in a specific direction. This phenomenon is useful in sunglasses and photography to reduce glare, as it allows manufacturers to minimize reflected glare by choosing angles where polarization occurs. The Brewster angle depends on the materials' properties, especially their refractive indices.