During the investigation of a new type of optical fiber having an index of refraction $n = 1.21 )$ a laser beam is aimed at the flat end of a straight fiber,as shown in the figure.What is the maximum angle of incidence θ₁ if the beam is not to escape from the sides of the fiber if it is surrounded by air? A)42.9° B)39.8° C)36.7° D)33.6° E)30.5°

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The Answer of During the investigation of a new type of optical fiber having an index of refraction $n = 1.21 )$ a laser beam is aimed at the flat end of a straight fiber,as shown in the figure.What is the maximum angle of incidence θ₁ if the beam is not to escape from the sides of the fiber if it is surrounded by air? A)42.9° B)39.8° C)36.7° D)33.6° E)30.5°

During the Investigation of a New Type of Optical Fiber n=1.21)n = 1.21 )n=1.21)

During the Investigation of a New Type of Optical Fiber $n = 1.21 )$