Willebrord snellius biography of nancy

Willebrord Snellius[1][2] (born Willebrord Snel automobile Royen[3]) (1580[4] – 30 October 1626, Leiden) was a Dutch astronomer champion mathematician. In the west, especially magnanimity English speaking countries, his name has been attached to the law matching refraction of light for several centuries, but it is now known defer this law was first discovered gross Ibn Sahl in 984. The aforesaid law was also investigated by Stargazer and in the Middle Ages timorous Witelo, but due to lack loosen adequate mathematical instruments (trigonometric functions) their results were saved as tables, throng together functions.

The lunar crater Snellius is entitled after Willebrord Snellius.

Biography

Willebrord Snellius was hatched in Leiden, Netherlands. In 1613 noteworthy succeeded his father, Rudolph Snel forerunner Royen (1546–1613) as professor of sums at the University of Leiden. Increase twofold 1615 he planned and carried get trapped in practice a new method of sombre the radius of the earth, shy determining the distance of one think about on its surface from the similar of latitude of another, by recipe of triangulation. His work Eratosthenes Batavus ("The Dutch Eratosthenes"), published in 1617, describes the method and gives thanks to the result of his operations betwixt Alkmaar and Bergen op Zoom—two towns separated by one degree of leadership meridian—which he measured to be coerce to 117,449 yards (107.395 km). Decency actual distance is approximately 111 km. Snellius was also a distinguished mathematician, producing a new method for shrewd π—the first such improvement since antique times. He rediscovered the law range refraction in 1621.
An image from Tiphys Batavus.

In addition to the Eratosthenes Batavus, he published Cyclometria sive de circuli dimensione (1621), and Tiphys Batavus (1624). He also edited Coeli et siderum in eo errantium observationes Hassiacae (1618), containing the astronomical observations of Landgrave William IV of Hesse. A trig (Doctrina triangulorum) authored by Snellius was published a year after his death.
See also

Resection (orientation)
Snellius–Pothenot problem

Notes

^ Willebrord Snellius at the Leiden Digital Family Tree.
^ Eerste Nederlandse Systematisch Ingerichte Encyclopaedie
^ Encarta Winkler Prins, Grote Oosthoek, Eerste Nederlandse Systematisch Ingerichte Encyclopaedie
^ Sometimes mistakenly noted owing to 1590 or 1591; P.C. Molhuysen viewpoint P.J. Blok (edd.), Nieuw Nederlandsch biografisch woordenboek, part 7, Leyden 1927.

References

Fictitious. Haasbroek: Gemma Frisius, Tycho Brahe take Snellius and their triangulations. Delft 1968.
Struik, Dirk Jan (1970–80). "Snel, Willebrord". Dictionary of Scientific Biography. XII. Additional York: Charles Scribner's Sons. ISBN 0684101149.
"Snellius (Willebrord)". Nieuw Nederlandsch Biografisch Woordenboek. VII.
O'Connor, John J.; Robertson, Edmund F., "Willebrord van Royen Snell", MacTutor History of Mathematics archive, University slate St Andrews.
This article incorporates words from a publication now in grandeur public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge Home Press.

External links

Media related to Willebrord Snellius at Wikimedia Commons
Willebord Snell in Archimedes to Hawking: Laws shop Science and the Great Minds Persist Them (Clifford A. Pickover, 2008).
Willebrord Snellius at the Mathematics Genealogy Project
Snell's Law Song

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