Unformatted text preview: in phasor form. (b) Determine the real instantaneous form of the result of part a. (c) Describe the wave that is formed. 5. A dielectric waveguide is shown in the figure below with refractive indices as labeled. Incident light enters the guide at angle φ from the front surface normal as shown. Once inside, the light totally reflects at the upper n 1- n 2 interface, where n 1 > n 2 . All subsequent reflections from the upper and lower boundaries will be total as well, and so the light is confined to the guide. Express , in terms of n 1 and n 2 , the maximum value of φ such that total confinement will occur, with n = 1. The quantity sin φ is known as the numerical aperture of the guide....
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- Spring '10
- Light, Fundamental physics concepts, uniform plane wave, Uniform Plane Waves