A ray of light (ab) is incident on the surface of a piece of glass at such an angle that the reflected ray (bc) is totally polarized. The directed line segment that represents the refracted ray is
A) 1
B) 2
C) 3
D) 4
E) None of these is correct.

Question

A ray of light (ab) is incident on the surface of a piece of glass at such an angle that the reflected ray (bc) is totally polarized. The directed line segment that represents the refracted ray is
A) 1 
B) 2 
C) 3 
D) 4 
E) None of these is correct.

Quizplus · Accepted Answer

When a ray of light is incident on a surface at a particular angle called the Brewster's angle, the reflected ray becomes totally polarized. At this angle, the reflected ray and refracted ray are perpendicular to each other. The refracted ray is represented by segment 3 in the figure. Therefore, the correct choice is C.

A Ray of Light (Ab) Is Incident on the Surface