If the polarising angle (the angle at which reflected light is completely plane polarised) of a flat piece of sapphire is 60.5$\degree$, what is its index of refraction?
A)1.97
B)1.77
C)1.59
D)2.36
E)1.82

Question

Quizplus · Accepted Answer

The polarising angle is given by the equation tanΘp=n, where n is the refractive index of the material. Therefore, n=tan60.5=1.77. The correct answer is B.

If the Polarising Angle (The Angle at Which Reflected Light °\degree°

If the Polarising Angle (The Angle at Which Reflected Light $\degree$