For a homogeneous optical prism in air, with apex angle and refractive index , minimum deviation occurs at the symmetric ray path. Then both internal angles are and both external angles are , so Snell's law givesMeasuring the deviation therefore determines the refractive index at the chosen wavelength.
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Minimum deviation is a concept that can refer to different things depending on the context. Here are a few interpretations: 1. **Statistics and Data Analysis**: In statistics, minimum deviation often refers to the smallest difference between observed values and a central value (like the mean or median). It's used in various statistical calculations and optimization problems to minimize the spread of data points.