Willebrord Snellius, also known as Snell, was a Dutch mathematician and astronomer, best known for formulating Snell's Law of Refraction in the early 17th century. His work laid the foundation for understanding how light refracts or bends when it passes from one medium into another, a principle fundamental to optics. Snellius is also recognized for his contributions to various areas of mathematics, including trigonometry and cartography.
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