Optics


   
 
Malus' Law
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 ip
 
 
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.
 
 
 
     
   
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Optics