Willebrord Snellius (1580–1626)

Born 1580 CE, died 1626 CE.

Willebrord Snellius (born Willebrord Snel van Royen, also Willebrord van Roijen Snell (13 June 1580 – 30 October 1626), commonly known simply as Snellius and Snell, was a Dutch astronomer and mathematician. Snell is best known for discovering the law of refraction of light, now known as Snell's law, his pioneering work in survey known as Snellius's triangulation, and the Snellius–Pothenot problem, a means in planar trigonometry of finding an unknown point from known ones. Despite being commonly attributed to Snell, the law of refraction was first discovered by the Persian scientist Ibn Sahl around 984 AD.

Text from the Wikipedia article Willebrord_Snellius, licensed CC BY-SA 4.0.

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Willebrord Snellius

Text from the Wikipedia article Willebrord_Snellius (revision 1372011202), licensed CC BY-SA 4.0.

Willebrord Snellius (1580–1626)

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