Fiber Optic Cable Is in the Form of a Cylindrical

question 18

Multiple Choice

Fiber optic cable is in the form of a cylindrical core of fiber with index of refraction 1.67 surrounded by a layer of cladding of index 1.45. What is the maximum angle for light rays inside the fiber core with respect to the cable's axis for which the light will be fully transmitted thanks to total internal reflection?

• A) 29.7°
• B) 60.3°
• C) 36.8°
• D) 53.2°

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