Meaning of Brewster's law

Brew'ster's law'

Pronunciation: [key]
— Optics. Optics.
  1. the law that light will receive maximum polarization from a reflecting surface when it is incident to the surface at an anglehaving a tangent equal to the index of refraction of the surface.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.