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

Question

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

Quizplus · Accepted Answer

The critical angle between two mediums is given by sin-¹(n2/n1), where n1 is the refractive index of the first medium (in this case, quartz) and n2 is the refractive index of the second medium (in this case, oil). Therefore, the critical angle for quartz immersed in oil is sin-¹(1.1/1.5).

Which One of the Following Expressions Determines the Critical Angle