Question

find the angle of polarisation when the light is indicate on a glass surface of refrective index 1.5​

Answer 1

Answer:

Polarizing angle or the Brewster's angle is the angle at which an incident ray gets reflected and refracted through the medium such that the two beams are perpendicular to each other.

By Snell's Law, n

1

sini=n

2

sinr

Also i+r=90

∘

Thus, n

1

sin(90

∘

−r)=n

2

sinr

Hence, r=tan

−1

(

n

2

n

1

)=tan

−1

(

1.55

1

)=32

∘

49

′