Light;optical fiber

Question 3: Consider the following situation: A beam of light, starting in air, enters an optical fiber at an angle of a. Show that we can guarantee total internal reflection at the side wall if the index of refraction is greater than about 1.42. In other words, show that regardless of what a is, the light will be refracted back into the material if the index of refraction is greater than about 1.42.

Sample Solution

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