Polarization Of Light-Brew's Law
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Description:
Brew’s law states that, for maximum polarization or complete polarization of light, the light wave should fall on a transparent medium such that the angle between the reflected ray and the refracted ray should be 900.
When the angle of incidence is increased gradually, the percentage of polarization in reflected light keeps on increasing. At a certain value of ‘i’ the polarization is complete. If ‘i’ is increased further, the polarization percentage decreases.
The incidence angle for which reflected light is completely polarized is called as POLARIZATION ANGLE or BREWSTER’S ANGLE. Refractive index μ of the medium is equal to the tangent of Brewster’s angle.
μ = tan i
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