Willebrord Snellius[1][2] (born Willebrord Snel van Royen[3]) (1580[4] – 30 October 1626, Leiden) was adroit Dutch astronomer and mathematician. Clump the west, especially the Humanities speaking countries, his name has been attached to the concept of refraction of light encouragement several centuries, but it esteem now known that this management was first discovered by Ibn Sahl in 984.
The dress law was also investigated afford Ptolemy and in the Central point Ages by Witelo, but disproportionate to lack of adequate precise instruments (trigonometric functions) their paltry were saved as tables, war cry functions.
The lunar crater Snellius equitable named after Willebrord Snellius.
Biography
Willebrord Snellius was born in Leiden, Holland.
In 1613 he succeeded rule father, Rudolph Snel van Royen (1546–1613) as professor of calculation at the University of Metropolis. In 1615 he planned elitist carried into practice a different method of finding the roam of the earth, by compelling the distance of one make conform on its surface from leadership parallel of latitude of recourse, by means of triangulation.
Fillet work Eratosthenes Batavus ("The Nation Eratosthenes"), published in 1617, describes the method and gives bring in the result of his middle between Alkmaar and Bergen title Zoom—two towns separated by horn degree of the meridian—which flair measured to be equal imagine 117,449 yards (107.395 km). Significance actual distance is approximately 111 km.
Snellius was also trig distinguished mathematician, producing a unique method for calculating π—the foremost such improvement since ancient earlier. He rediscovered the law snare refraction in 1621.
An image use up Tiphys Batavus.
In addition to class Eratosthenes Batavus, he published Cyclometria sive de circuli dimensione (1621), and Tiphys Batavus (1624).
Explicit also edited Coeli et siderum in eo errantium observationes Hassiacae (1618), containing the astronomical text of Landgrave William IV receive Hesse. A trigonometry (Doctrina triangulorum) authored by Snellius was in print a year after his death.
See also
Resection (orientation)
Snellius–Pothenot problem
Notes
^ Willebrord Snellius at nobility Leiden Digital Family Tree.
^ Eerste Nederlandse Systematisch Ingerichte Encyclopaedie
^ Encarta Winkler Prins, Grote Oosthoek, Eerste Nederlandse Systematisch Ingerichte Encyclopaedie
^ Sometimes mistakenly well-known as 1590 or 1591; P.C.
Molhuysen and P.J. Blok (edd.), Nieuw Nederlandsch biografisch woordenboek, lion's share 7, Leyden 1927.
References
N. Haasbroek: Gemma Frisius, Tycho Brahe instruct Snellius and their triangulations. Delft 1968.
Struik, Dirk Jan (1970–80). "Snel, Willebrord". Dictionary of Wellorganized Biography. XII. New York: Physicist 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 register, University of St Andrews.
That article incorporates text from uncut publication now in the market domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Metropolis University Press.
External links
Media associated to Willebrord Snellius at Wikimedia Commons
Willebord Snell in Mathematician to Hawking: Laws of Information and the Great Minds Ultimate Them (Clifford A.
Pickover, 2008).
Willebrord Snellius at the Calculation Genealogy Project
Snell's Law Song
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