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| Snell's law [ snélz làw ] |
noun |
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| Definition: |
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law governing refraction angle: the law stating that for a light ray passing between two media the ratio of the sines of the angle of incidence and the angle of refraction is a constant
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| [Late 19th century. After Willebrord Van Roijen Snell (1591-1626), Dutch astronomer and mathematician] |
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