An Optical Fiber Is Made of Clear Plastic with Index

question 44

Multiple Choice

An optical fiber is made of clear plastic with index of refraction n = 1.52.For what angles with the surface will light remain within the plastic "guide"?

• A) ϕ < 33.3°
• B) ϕ < 59.2°
• C) ϕ < 41.1°
• D) ϕ < 48.9°
• E) ​ϕ < 70.0°

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