An Optical Fiber Made of Glass with an Index of Refraction

question 18

Multiple Choice

An optical fiber made of glass with an index of refraction 1.50 is coated with a plastic with index of refraction 1.30.What is the critical angle of this fiber at the glass-plastic interface?

• A) 90.0°
• B) 41.8°
• C) 60.1°
• D) 50.2°
• E) 61.1°

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