问题标题：
3. What is total internal reflection and name one scenario where total internal reflection isinvolved.
问题描述：
3. What is total internal reflection and name one scenario where total internal reflection isinvolved.
黄蕾回答：
什么是全反射?并且给出全反射的一个应用.
ANSWER:
Totalinternalreflectionisaphenomenoninwhichelectromagneticradiationinagivenmediumwhichisincidentontheboundarywithaless-densemedium(onehavingalowerindexofrefraction)atananglelessthanthecriticalangleiscompletelyreflectedfromtheboundary.
后半个问题我觉得举光纤就可以了
Opticalfibreisaflexibleopticallytransparentfiber,usuallymadeofglassorplastic,throughwhichlightcanbetransmittedbysuccessiveTIR.
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