A ray of light strikes a glass plate at an angle of 600. If the reflected and refracted rays are perpendicular to each other, then refractive index of glass is

Brewster’s law is defined as the light which receives maximum polarization from a reflecting surface when it is incident to the surface at an angle such that the tangent is equal to the index of refraction.

The law is mathematically given as:

μ = tan ip


  • μ is the refractive index of the surface
  • ip is the polarizing angle of incidence

According to Brewster’s law μ = tanθ, = tan60o = √3

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