Question

the reflected ray is completely polarized fir certain angle ii incidence in a transparent medium . if angle of refraction is 3 degrees then the refractive index of medium is

Answer 1

Answer:

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Explanation:

In Optics, The angle of incidence to which the angle of refraction is 90° is called the critical angle. The ratio of velocities of a light ray in the air to the given medium is a refractive index. Thus, the relation between the critical angle and refractive index can be established as the Critical angle is inversely proportional to the refractive index

Answer 2

Answer:

  We know, angle of incidence = angle of reflection .

Since the reflected rays are completely polarized , the angle between refracted ray and reflected ray will be 90 degree .

angle between normal and refracted ray is 30 degree .  By drawing the figure of refraction and reflection we understand that

The angle of reflection = 60 degree = Angle of incidence .

According to Brewsters law , tan of angle of incidence gives refractive index .

Implies tan 60 = root 3 = 1.73 is the refractive index of the medium