Question

In Germany they came first for the Communists, and I didn't speak up because I wasn't a Communist. Then they came for the Jews, and I didn't speak up because I wasn't a Jew. Then they came for the trade unionists, and I didn't speak up because I wasn't a trade unionist. Then they came for the Catholics, and I didn't speak up because I was a Protestant. Then they came for me, and by that time no one was left to speak up. Light is incident on a water surface at an angle such that reflected light (ray 1 in diagram) is completely plane polarized. What is the angle of incidence ? A block of glass (index 1.50) is immersed as shown. The light reflected from the glass surface (ray 2) is complete linearly polarized. What is the angle between the surface of the water and the surface of the glass? Linearly polarized light is incident upon the surface of a glass plate of index 1.732 at an angle of incidence of 60 degree. The electric field vector in the incident light makes an angle of 30 degree with the plane of incidence. What fraction of the incident intensity is reflected at the first surface ?

Please solve problem 971.

(a) 53 degree

(b) 11.4 degree

Answer 1

A) for warter n=1.33, so:

$\theta _{i}=\theta _{p} = tan^{-1}(1.33)$

$=53.06^{\circ}$

B) From water to glass

$\theta _{i}=\theta _{p}=tan^{-1}(\frac{n_{t}}{n_{i}})$

$\theta _{i}=\theta _{p}=tan^{-1}(\frac{1.5}{1.33})=48.44^{\circ}$

The angle between glass and water surface

$angle=\theta _{i}{}'-\theta _{t}$

$\theta _{t}=90^{\circ}-53.06^{\circ}=36.94^{\circ}$

$angle=48.44^{\circ}-36.94^{\circ} =11.5^{\circ}$