An Optic Fiber Is Made of Clear Plastic with Index

question 21

Multiple Choice

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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