A Fiber Optic Line Is Composed of a Core with an Index

question 86

Multiple Choice

A fiber optic line is composed of a core with an index of refraction of 1.51 and cladding with an index of 1.40. Which one of the following relations best describes angles of incidence $\theta$ that will result in total internal reflection within the fiber optic line?

• A)\(\theta\)< 68°
• B)\(\theta\) > 68°
• C)\(\theta\) < 22°
• D)\(\theta\) > 22°
• E)0 \(\le\) \(\theta\) \(\le\)90°