Question

Refractive index of material is equal to tangent of polarising angle. It is called(a) Brewster’s law(b) Lambert’s law(c) Malus’s law(d) Bragg’s law

Answer 1

it is called Brewster law.

Answer 2

Answer:

(a) Brewster’s law is the correct answer.

Explanation:

It tells about the relationship between refractive index and polarizing angle.

It states that the Refractive index of material is equal to tangent of the polarising angle.

Polarizing angle will depend upon the refractive index.

Polarizing angle is formed when the angle of incidence is incident on the surface and the reflected ray is completely polarized.

It is written as ip.

According to the Brewster's law,

tanip = u

Brewster's law is used in polarised sunglasses.

It is also used in glasses which transmit 100% light. They are used in solid state lasers.