The angle of incidence at which reflected light is totally polarised for refraction from air to glass (refractive index 
) is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Suppose, 
is the Brewster's angle, when unpolarised light is incident at an polarising angle, the reflected component along 
and refracted component along 
in the following figure.
Now, 
Here, 
is the angle of refraction.
According to Snell's law, 
When 
, then
where, 
is polarised angle.
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