Physics

Problem

Consider a tank made of glass (refractive index 1.5) with a thick bottom. It is filled with a liquid of refractive index

\mu

. A student finds that, irrespective of what the incident angle

i

(see figure) is for a beam of light entering the liquid, the light reflected from the liquid glass interface is never completely polarized. For this to happen, the minimum value of

\mu

is: [Main 9 Jan. 2019 I] ![Diagram showing a ray of light incident from a liquid layer (refractive index mu) onto a glass layer (refractive index n = 1.5). The angle of incidence is labeled i. The ray is partially reflected and partially refracted into the glass layer.](https://storage.googleapis.com/diraq-contents/homework-question-parsing/marker/20260106T182719Z/3f5848d153a642ea8219f5cff691e6e8/935eed7aa61f7777f62cfc032e11bee9_img.jpg) (a)

\sqrt{\frac{5}{3}}

(b)

\frac{3}{\sqrt{5}}

(c)

\frac{5}{\sqrt{3}}

(d)

\frac{4}{3}

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