The polarising angle in air for diamond is 67.4$\degree$.Calculate the critical angle inside the diamond for total internal reflection.
A)32.6$\degree$
B)22.6$\degree$
C)24.6$\degree$
D)28.6$\degree$
E)48.8$\degree$

Question

Quizplus · Accepted Answer

The polarising angle (Brewster's angle) is given by $\tan(\theta_p) = n$, where $n$ is the refractive index of diamond. For diamond, $\theta_p = 67.4\degree$, so $n = \tan(67.4\degree)$. The critical angle $\theta_c$ is given by $\sin(\theta_c) = \frac{1}{n}$. Calculating this gives $\theta_c \approx 24.6\degree$.

The Polarising Angle in Air for Diamond Is 67 °\degree° Calculate the Critical Angle Inside the Diamond for Total Internal

The Polarising Angle in Air for Diamond Is 67 $\degree$ Calculate the Critical Angle Inside the Diamond for Total Internal