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MHT CET2010PhysicsWave Optics

Light is incident at an angle i on a glass slab. The reflected ray is completely polarised. The angle of refraction is

Options

  1. A90^ -i
  2. B180^ -i
  3. C90^ +i
  4. Di

Correct answer

A. 90^ -i

Step-by-step solution

Brewster discovered that when a beam of unpolarised light is reflected from a transparent medium (refractive index = ) , the reflected light is completely plane polarised at a certain angle of incidence (called the angle of polarisation i ) From figure it is clear that i+r=90^ r=(90-i)

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