Question

A beam of light is incident on a glass plate, n =1.7, and the reflected ray is completely polarized. What is the angle of refraction, in degrees, for the beam?

Answer 1

Given

A beam of light is incident on a glass plate, n =1.7, and the reflected ray is completely polarized.

To find

The angle of refraction

Step-by-step explanation

Since the refleted ray is completely polarised.

`\begin{gathered} tani=n \\ \Rightarrow i=tan^(-1)(1.7) \\ \Rightarrow i=59.53^o \end{gathered}`

By Snell's law,

`\begin{gathered} (sini)/(sinr)=n \\ \Rightarrow(sin59.53^o)/(sinr)=1.7 \\ \Rightarrow sinr=0.506 \\ \Rightarrow r=30.39^o \end{gathered}`

Conclusion

The angle of refraction is

`30.39^o`