What is polarization by reflection and Brewster's law?
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Polarization by reflection:
. When light shines at a certain angle, it is possible for the reflected light to become completely polarized. This phenomenon is called polarization by reflection.
It is the plane of polarisation parallel to the plane of the interface.
Polarization by Brewster's law:
Brewster's angle is an angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface, with no reflection. When unpolarized light is incident at this angle, the light that is reflected from the surface is therefore perfectly polarized.
A glass plate or a stack of plates placed in a light beam at Brewster's angle can thus be used as a polarizer.