Which one of the following expressions determines the critical angle for quartz (n = 1.5) immersed in oil (n = 1.1)? A)$\theta$_c = 1.5/1.1 B)$\theta$_c = sin^-¹ (1.1/1.5) C)$\theta$_c = sin (1.1/1.5) D)$\theta$_c = tan^-¹ (1.1/1.5)

Question

Quizplus · Accepted Answer

The critical angle is given by $\theta$_c = sin^-¹ (n₂/n₁), where n₁ is the refractive index of the medium in which the light is traveling and n₂ is the refractive index of the medium into which the light is passing. In this case, n₁ = 1.5 and n₂ = 1.1, so $\theta$_c = sin^-¹ (1.1/1.5) = 48.7°.

Which One of the Following Expressions Determines the Critical Angle θ\thetaθ

Which One of the Following Expressions Determines the Critical Angle $\theta$