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Question: 

A piece of material, suspected of being a stolen diamond (n = 2.42), is submerged in oil of refractive index 1.43 and illuminated by unpolarized light. It is found that the reflected light is completely polarized at an angle of $62 ^\circ$. Is it diamond? Explain.

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

no, this is not diamond since the index of refraction is not 2.42

Giancoli 7th Edition, Chapter 24, Problem 65

(1:90)

Chapter 24, Problem 65 is solved.

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