Ex.1. Consider a fiber in air with no=1, n¡=1.53, and n2=1.5. Calculate and draw a ray diagram for the following: a) The smallest value of the internal angle (i.e. O.), b) The maximum angle the ray in air makes with the fiber axis, c) A and NA. (ans.:78.6°, 17.6°, 0.019, 0.30).
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