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2. Refractive index metrology
2.1 Refraction methods
The study of geometrical optics led to the notion of light rays propagating in a straight line, at constant speed, through homogeneous media. This led to the establishment of the simple Snell-Descartes laws of reflection and refraction.
Consider a light ray incident at the interface of two media of respective indices n 1 and n 2 (figure
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Refractive index metrology
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