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English: Waveguides can be described by ray optics and total internal reflection. a. Light passing into a medium with a higher refractive index bends toward the normal. b. Each ray in the low index medium (black) maps to a ray in the high index medium (blue). The remaining rays (red) in the high index medium are trapped by a process called total internal reflection. c. A slab of high index material will trap rays at both top and bottom surfaces, guiding the light and forming a waveguide. d. This is the principle behind an optical fiber.
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Author C.Sarabalis

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8 January 2022

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current03:40, 9 January 2022Thumbnail for version as of 03:40, 9 January 2022512 × 1,318 (5 KB)C.SarabalisCross-wiki upload from en.wikipedia.org

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