State Brewster's law and give its one application.

1.	State Brewster's law and give its one application.
Answer» According to this law when unpolarised light is incident at polarising angle (i) on an interface separating a rarer medium from a denser medium, of refractive index μ such thatμ = tan i,then light reflected in the rarer medium is completely polarised. Reflected and refractive rays are perpendicular to each other. Application One general example for theapplicationof Brewster's lawis polarized sunglasses. These glasses uses the principle ofBrewster's angle. The polarized glasses reduce glare that is reflecting directly from the sun and also from horizontal surface like road and water.

Answer»

According to this law when unpolarised light is incident at polarising angle (i) on an interface separating a rarer medium from a denser medium, of refractive index μ such thatμ = tan i,then light reflected in the rarer medium is completely polarised. Reflected and refractive rays are perpendicular to each other.

Application One general example for theapplicationof Brewster's lawis polarized sunglasses. These glasses uses the principle ofBrewster's angle. The polarized glasses reduce glare that is reflecting directly from the sun and also from horizontal surface like road and water.

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