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

• A. \(\sqrt {\frac{5}{3}} \)
• B. \(\frac{3}{{\sqrt 5 }}\)
• C. \(\frac{5}{{\sqrt 3 }}\)
• D. \(\frac{4}{3}\)