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Willebrord Snell snell, willebrord van Roijen (15801626) (The Hutchinson Dictionary of ScientificBiography). snell, willebrord (The Columbia Encyclopedia, Sixth Edition) http://www.infoplease.com/ce6/people/A0845695.html
Snellius, Willebrord More on willebrord snellius from Infoplease. willebrord snell snell or snellius,willebrord , 15911626, Dutch mathematician. He is generally credited http://www.infoplease.com/ce6/people/A0918861.html
Snell, Willebrord snell, willebrord (15811626) snell was born in Leiden, where he studied andeventually became professor. snell developed the method of triangulation in http://www.cartage.org.lb/en/themes/Biographies/MainBiographies/S/snell_1/1.html
Extractions: Snell developed the method of triangulation in 1615, starting with his house and the spires of nearby churches as reference points. He used a large quadrant over 2 m/7 ft long to determine angles, and by building up a network of triangles, was able to obtain a value for the distance between two towns on the same meridian. From this, Snell made an accurate determination of the radius of the Earth. The laws describing the reflection of light were well known in antiquity, but the principles governing the refraction of light were little understood. Snell's law was published by French mathematician Descartes in 1637. He expressed the law differently from Snell, but could easily have derived it from Snell's original formulation. Whether Descartes knew of Snell's work or discovered the law independently is not known.
Willebrord Van Roijen Snell (1591 - 1626) Translate this page Recursos para que os estudantes possam entender os conceitos de física, e recursospara que os professores de física possam preparar suas aulas. http://paginas.terra.com.br/educacao/fisicavirtual/grandes/snell.htm
Extractions: Willebrord van Roijen Snell Willebrord van Roijen Snell nasceu em 1580 na cidade de Leyden, Países Baixos, e faleceu na mesma cidade em 30 outubro 1626. Estudou Direito na universidade Leyden. Porém, se interessava muito por matemática; vindo a ensinar essa disciplina mesmo enquanto foi estudante de leis. Em 1600 viajou a vários países europeus, principalmente discutindo astronomia. Em 1602 foi a Paris onde continuou seus estudos. Recebeu seu diploma em Leyden em 1607. (Cidade de Leiden em 1626) Snell era filho de um professor de Matemática da Universidade de Leiden. Em 1613, sucedeu o pai nessa função. Em 1617 Snell publicou Eratosthenes Batavus , no qual propõe seu método de triangulação para medir a terra; fundando assim a Geodesia. Esse método é utilizado até hoje para executar mapeamentos topográficos. (É a base, inclusive, para os efetuados com auxílio de satélites). Snell melhorou também o método clássico para calcular os valores aproximados de pi por meio de polígonos. (Observatório da Universidade de Leiden, 1633)
Willebrord Van Roijen Snell Translate this page willebrord Van Roijen snell foi um matemático holandês, que nasceu em 1591 emorreu em 1626. Era filho de um professor de Matemática da Universidade de http://paginas.terra.com.br/educacao/calculu/Historia/snell.htm
BBC - History - Willebrord Van Roijen Snell (1580 - 1626) Described by Kepler as a credit to the geometry of our century , snell was amathematical prodigy whose early work on triangulation led to further http://www.bbc.co.uk/history/historic_figures/snell_willebrord_van_roijen.shtml
Extractions: Send it to a friend! The son of a mathematician and linguist, Snell was originally intended to study law, but loved mathematics so much that by the age of eleven he was lecturing it at Leyden University alongside his law studies. In 1600 he travelled around Europe for two years before moving to Paris, once more to study law. However, on arrival back in Leyden in 1604 he decided to concentrate fully on mathematics. From 1610 he lectured on astronomy and mathematics for two years, becoming a full professor in 1615, upon which he decided to determine the meridian; the circumference of the earth. He established a network of cities forming triangles. A single measurement of a carefully selected baseline of just a few hundred metres enabled him to calculate the distances between all the towns via triangulation. He started with his house and local church towers as the triangulation points, eventually computing the distance between Alkmaar in the North and Bergen-op-Zoom in the South, a distance of 130km. As the use of astronomy had told him the latitude of these towns, he could calculate the distance between single lines of latitude, and therefore the circumference of the earth.
Snell, Willebrord snell, willebrord van Roijen. (15801626). Holandský fyzik a optik. Je objevitelemzákona lomu. Podrobne zkoumal krivku loxodromu. vylepil metodu výpoctu http://www.aldebaran.cz/famous/people/Snell_Willebrord.html
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Extractions: Willebrord Snell was an early seventeenth century Dutch mathematician who is best known for determining that transparent materials have different indices of refraction depending upon their composition. Snell was born to an affluent family in Leiden in 1580, and started studying mathematics as a very young man. His father was a scholar and professor of mathematics at the University of Leiden. Snell entered the University of Leiden at a relatively young age where he originally studied law. His attention soon turned to mathematics and he was teaching at the university by the time he was 20 years old. After finishing with his degree at the university, he traveled to eastern Europe and visited most of the major astronomers of the day. In 1613, Snell succeeded his father as professor of mathematics at Leiden and in 1617, he published Eratosthenes Batavus , which explained his methodology for measuring the Earth by triangulation. Snell had difficulty completing his work until the brother barons Sterrenberg took over and finished it with his assistance. This important work wove the foundations of modern geodesy. Snell also published other works, including his work on comets and in 1624, he published
MSN Encarta - Snell, Willebrord Translate this page snell, willebrord (Leida 15801626), scienziato olandese. Studiò diritto macoltivò linteresse per la Trova altre informazioni su snell, willebrord http://it.encarta.msn.com/encyclopedia_1041506772/Snell_Willebrord.html
Extractions: Sie sind hier: Startseite Lexikon Willebrord van Roijen Snell Willebrord Snell. Willebrord van Roijen Snell in Leiden Niederlande 30. Oktober in Leiden), auch bekannt als Snell van Royen oder Snellius, war ein niederl¤ndischer Astronom und Mathematiker . Er ist bekannt f¼r die Entwicklung des optischen Brechungsgesetzes , nach ihm bekannt als Snelliussches Brechungsgesetz
Willebrord Snell snell or snellius, willebrord , 15911626, Dutch mathematician. He is generallycredited with the discovery (1621) of the law of the refraction of light. http://www.factmonster.com/ce6/people/A0845695.html
Extractions: Reference Desk Encyclopedia Snell or Snellius, Willebrord u u s] Pronunciation Key Snell or Snellius, Willebrord , Dutch mathematician. He is generally credited with the discovery (1621) of the law of the refraction of light. In 1613 he became professor of mathematics at the Univ. of Leiden. His two chief works are Eratosthenes Batavus (1617) and Cyclometricus The Columbia Electronic Encyclopedia, AD AD AD ADS Business Cards Link to Fact Monster Add Fact Monster search ... Privacy
Snellius, Willebrord More on willebrord snellius from Fact Monster. willebrord snell snell orsnellius, willebrord , 15911626, Dutch mathematician. He is generally credited http://www.factmonster.com/ce6/people/A0918861.html
Snell | Willebrord | 1591-1626 | Dutch Mathematician snell willebrord 15911626 Dutch mathematician. Gregory Papers (1675-1713);David Gregory Papers (1675-1713); Excerpta et notanda in Kepleri ad http://www.nahste.ac.uk/pers/s/GB_0237_NAHSTE_P1104/
Encyclopædia Britannica Roijen snell, willebrord van (Du. astron. and math.) see snell, willebrord vanRoijen Roiphe, Anne (Am. feminist and au.) http://www.britannica.com/eb/index?seq=289864&alphakey=r&pageDir=n
Short Biographies : Si snell, willebrord van Roijen. 1580 30 Oct 1626 Dutch An astronomer andmathematician best known for his law of refraction of light. http://www.hallym.ac.kr/~physics/reference/physicist/Si.html
Extractions: An astronomer and mathematician best known for his law of refraction of light. In 1613 he succeeded his father Rudolph Snell (1546-1613) as professor of mathematics at the University of Leiden. He studied the loxodrome the path on the sphere that makes constant angle with the meridians. In 1617 he published Eratosthenes Batavus , which contains his methods for measuring the earth. He also improved the classical method of calculating approximate values of by polygons. Using his method 96 sided polygons give correct to 7 places while the classical method yields only 2 places. van Ceulen 's 35 places could be found with polygons of 2^30 sides rather than 2^62. Although he discovered the law of refraction, a basis of modern geometric optics, in 1621, he did not publish it and only in 1703 did it become known when Huygens published Snell's result in Dioptrica Sommerfeld , Arnold Johannes Wilhelm
Willebrord Snell - Wikipedia, The Free Encyclopedia willebrord snell. Enlarge. willebrord snell. willebrord snell (1580 October30, 1626), also known as snell van Royen or snellius, was a Dutch astronomer http://en.wikipedia.org/wiki/Snellius
Extractions: The Red Cross and other charities also need your help. (Redirected from Snellius For the lunar crater named Snellius, see Snellius (crater). Willebrord Snell. Willebrord Snell October 30 ), also known as Snell van Royen or Snellius , was a Dutch astronomer and mathematician , most famous for the law of refraction now known as Snell's law Snell was born at Leiden . In he succeeded his father Rudolph Snell ( ) as professor of mathematics in the University of Leiden . In he planned and carried into practice a new method of finding the radius of the earth, by determining the distance of one point on its surface from the parallel of latitude of another, by means of triangulation . His work Eratosthenes Batavus ("The Dutch Eratosthenes "), published in , describes the method and gives as the result of his operations between Alkmaar and Bergen op Zoom âtwo towns separated by one degree of the meridian, which he measured to be equal to 117,449 yards (107.395 km ). The actual distance is approximately 111 km. Snell was also a distinguished mathematician, producing a new method for calculating
