A ray 
is incident on the plane surface of the glass slab (kept in air) of refractive index 
at an angle of incidence equal to the critical angle for this air glass system. The refracted ray 
undergoes partial reflection and refraction at the other surface. The angle between reflected ray 
and the refracted ray 
at that surface is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
The RI of glass slab 
RI of air = 1
critical angle for glass-air surface
angle of incidence 
According to snells law, we have
For glass air surface, we have
angle, 
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