Solved: Figure 33-61 depicts a simplistic optical fiber: a

Chapter 33, Problem 65

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Figure 33-61 depicts a simplistic optical fiber: a plastic core (nl = 1.S8) is surrounded by a plastic sheath (n2 = 1.53). A light ray is incident on one end of the fiber at angle 8. The ray is to undergo total internal reflection at point A, where it encounters the Fig. 33-61 6S. core-sheath boundary. (Thus there is no loss of light through that boundary.) What is the maximum value of 8 that allows total internal reflection at A?

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