Total Internal Reflection: an Optic Fiber Is Made of Clear

question 99

Multiple Choice

Total internal reflection: An optic fiber is made of clear plastic with index of refraction of 1.50, surrounded by air. For what angles of incidence θ will light remain within the plastic fiber?

• A) θ ≥ 21.1°
• B) θ < 38.3°
• C) θ > 38.3°
• D) θ < 41.8°
• E) θ > 41.8°

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