Brewster's law

Brewster's law explains how light behaves when it hits a surface at a specific angle, known as the Brewster angle. At this angle, the reflected light is perfectly polarized, meaning its waves vibrate in a single direction. This occurs because, at the Brewster angle, the reflected and refracted rays are perpendicular. Mathematically, it relates the angle to the refractive indices of the two materials involved. Understanding Brewster's law helps in designing polarized sunglasses, optical instruments, and understanding light reflections in nature.