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

question 28

Multiple Choice

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