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If
q is the angle between the plane of transmission of the analyzer and the polarizer, then intensity of the transmitted light I is
where Io is intensity of light transmitted from polarizer.
Brewster's Law (Polarization by Reflection)
When unpolarised light is incident at polarizing angle ip on an interface separating air from a medium of refractive index m then,
m = tan i
p
When the light is incident at polarizing angle ip, the reflected component along OB and refracted component along OC are mutually perpendicular to each other.
