For total internal reflection to occur inside an optic fiber as shown in Fig. 22.29, the angle u must be greater than the critical angle for the fiber–air interface. At the end of the fiber, the incident light undergoes a refraction to enter the fiber. If total internal reflection is to occur for any angle of incidence (θi) outside the end of the fiber, what is the minimum index of refraction of the fiber?
Answer to relevant QuestionsTwo glass prisms are placed together (Fig. 22.30). (a) If a beam of light strikes the face of one of the prisms at normal incidence as shown, at what angle does the beam emerge from the other prism? (b) At what angle of ...A beam of red light is incident on an equilateral prism as shown in Fig. 22.31. (a) If the index of refraction of red light of the prism is 1.400, at what angle θ does the beam emerge from the other face of the prism? (b) ...An optic fiber of index of refraction of 1.6 is surrounded by a layer called the cladding layer. The index of refraction of the cladding is 1.3. If the angle of incidence inside the fiber is 40°, will there be light leaking ...Day–night rearview mirrors are common in cars. At night, when you tilt the mirror backward, the intensity and glare of headlights behind you are reduced (Fig. 23.22). The mirror is wedge shaped and is silvered on the back. ...An object is placed 50 cm in front of a convex mirror and its image is found to be 20 cm behind the mirror. What is the focal length of the mirror? What is the lateral magnification?
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