Question

A ray of light is incident on the surface of a glass plate from air at an angle of 45°. Calculate the angle of refraction and the deviation of the ray of light due to refraction. (r.i. of glass = 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