Question
Fri January 20, 2012 By: Aakanksha Choudhary
 

A ray of light reflected from surface of glass at an angle of 56*40' is found to be completely plane polarised. What is the angle of refraction of the transmitted ray? (* stands for degree)

Expert Reply
Sat January 21, 2012
It is the case of brewester"s law , here the angle between refracted and reflected ray is 900.Here angle of incidence is known as brewster angle iB. 
 
iB=56* 40'
 
?=Tan iB------(1)
 
We know siniB/sin r=?----(2)
 
use (1) and (2) and find angle r.
 
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