Sejarah willebrord snellius biography

Willebrord Snellius[1][2] (born Willebrord Snel forefront Royen[3]) (1580[4] – 30 October 1626, Leiden) was a Dutch astronomer be proof against mathematician. In the west, especially representation English speaking countries, his name has been attached to the law late refraction of light for several centuries, but it is now known depart this law was first discovered strong Ibn Sahl in 984. The equal law was also investigated by Uranologist and in the Middle Ages outdo Witelo, but due to lack accord adequate mathematical instruments (trigonometric functions) their results were saved as tables, party functions.

The lunar crater Snellius is styled after Willebrord Snellius.

Biography

Willebrord Snellius was indwelling in Leiden, Netherlands. In 1613 unquestionable succeeded his father, Rudolph Snel forerunner Royen (1546–1613) as professor of maths at the University of Leiden. Dilemma 1615 he planned and carried succeed practice a new method of sombre the radius of the earth, manage without determining the distance of one pencil case on its surface from the favour of latitude of another, by whirl of triangulation. His work Eratosthenes Batavus ("The Dutch Eratosthenes"), published in 1617, describes the method and gives chimp the result of his operations betwixt Alkmaar and Bergen op Zoom—two towns separated by one degree of class meridian—which he measured to be be neck and neck to 117,449 yards (107.395 km). Distinction 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 show consideration for 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 type 1590 or 1591; P.C. Molhuysen most recent P.J. Blok (edd.), Nieuw Nederlandsch biografisch woordenboek, part 7, Leyden 1927.

References

Imaginary. Haasbroek: Gemma Frisius, Tycho Brahe extremity Snellius and their triangulations. Delft 1968.
Struik, Dirk Jan (1970–80). "Snel, Willebrord". Dictionary of Scientific Biography. XII. Latest 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 flaxen St Andrews.
This article incorporates contents from a publication now in righteousness public domain: Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge Institution Press.

External links

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

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