Use the Following Figure Below for the Next Problem $\theta$ _c,at the Core-Cladding Interface?
A)44º
B)46º
C)55º
D)72º
E)None of

Multiple Choice

Use the following figure below for the next problem.
The figure shows a cross-
-A fiber optic is made by cladding a thin fiber core of refractive index n₁ = 1.45 with a material of refractive index n₂ = 1.38.What is the critical angle, $\theta$ _c,at the core-cladding interface?

A) 44º
B) 46º
C) 55º
D) 72º
E) None of these is correct.