What is the critical angle for diamond $(n=2.42)$ in air?
A) $2.42^{\circ}$
B) $67.5^{\circ}$
C) $24.4^{\circ}$
D) $65.6^{\circ}$
E) $37.1^{\circ}$

Question

Quizplus · Accepted Answer

The critical angle is calculated using the formula $\theta_c = \sin^{-1}(\frac{n_2}{n_1})$, where $n_2$ is the refractive index of air (1.0) and $n_1$ is the refractive index of diamond (2.42). This gives $\theta_c = \sin^{-1}(\frac{1}{2.42}) \approx 24.4^{\circ}$.

What Is the Critical Angle for Diamond (n=2.42)(n=2.42)(n=2.42) In Air? A) 2.42∘2.42^{\circ}2.42∘

What Is the Critical Angle for Diamond $(n=2.42)$ In Air?
A) $2.42^{\circ}$