Snell Biography of willebrord snell (15801626) willebrord van Roijen snell. Born 1580 in Leiden, Netherlands willebrord snell studied law at the University of Leiden but was very interested in mathematics and taught mathematics http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Snell.html
Extractions: Willebrord Snell studied law at the University of Leiden but was very interested in mathematics and taught mathematics even while he studied law. From about 1600 he travelled to various European countries, mostly discussing astronomy. In 1602 he went to Paris where his studies continued. He received his degree from Leiden in 1607. Snell's father, Rudolph Snell (1546-1613), was professor of mathematics at Leiden and, in 1604, Willebrord visited Switzerland with his father. In 1613 he succeeded his father as professor of mathematics at the University of Leiden. In 1617 Snell published Eratosthenes Batavus , which contains his methods for measuring the Earth. He proposed the method of triangulation and this work is the foundation of geodesy. Snell also improved the classical method of calculating approximate values of p by polygons. Using his method 96 sided polygons give
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WILLEBRORD SNELL willebrord snell. snell, willebrord (15911626), commonly known as snellITJS, Dutch astronomer and he succeeded his father Rudolph snell (1546-1613) as professor of mathematics http://www.1911encyclopedia.org/S/SN/SNELL_WILLEBRORD.htm
Extractions: SNELL, WILLEBRORD (1591-1626), commonly known as SNELLITJS, Dutch astronomer and mathematician, was born at Leiden in 1591. In 1613 he succeeded his father Rudolph Snell (1546-1613) as professor of mathematics in the university of Leiden. In 1615 he planned and carried into practice a new method of finding the dimensions of the earth, by determining the distance of one point on its surface from the parallel of another, by means of a triangulation. His work Eratosthenes Batavus, published in 1617, describes the method and gives as the result of his operations between Alkmaar and Bergen-opZoom a degree of the meridian equal to 55,100 toises= 117,449 yds. (A later recalculation gave 57,033 toises = 121,569 yds., after the application of some corrections to the measures indicated by himself.) Snell also distinguished himself as a mathematician, and discovered the law of refraction, in 1621 (see LIGHT). He died at Leiden on the 3oth of October 1626. In addition to the Eratosthenes Batavus he published Cycloinetria live de circuhi dimen none (1621), and Tiphys Batavus s. Histiodromice, de navium cursi bus ci re navali (1624). He also edited Coeli et s-iderum in eo errantium 011 servationes Hassiacae (1618), containing the astronomical observations of Landgrave William IV. of Hesse. A trigonometry (Doctrina triangulorum,) by him was published a year after his death. JOHN SNELL SNIPE
Snell, Willebrord snell, willebrord (15811626). Dutch mathematician and physicist whodevised the basic law of refraction, known as snell s law, in 1621. 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 Snell (1580-1626) willebrord snell (15801626) This is a biographical sketch of willebrord snell. snell was an early seventeenth century Dutch mathematician who is best known for determining that transparent http://rdre1.inktomi.com/click?u=http://micro.magnet.fsu.edu/optics/timeline/peo
WILLEBRORD SNELL snell, willebrord (15911626), commonly known as snellITJS, Dutch astronomerand mathematician, was born at Leiden in 1591. willebrord snell. http://85.1911encyclopedia.org/S/SN/SNELL_WILLEBRORD.htm
Extractions: SNELL, WILLEBRORD (1591-1626), commonly known as SNELLITJS, Dutch astronomer and mathematician, was born at Leiden in 1591. In 1613 he succeeded his father Rudolph Snell (1546-1613) as professor of mathematics in the university of Leiden. In 1615 he planned and carried into practice a new method of finding the dimensions of the earth, by determining the distance of one point on its surface from the parallel of another, by means of a triangulation. His work Eratosthenes Batavus, published in 1617, describes the method and gives as the result of his operations between Alkmaar and Bergen-opZoom a degree of the meridian equal to 55,100 toises= 117,449 yds. (A later recalculation gave 57,033 toises = 121,569 yds., after the application of some corrections to the measures indicated by himself.) Snell also distinguished himself as a mathematician, and discovered the law of refraction, in 1621 (see LIGHT). He died at Leiden on the 3oth of October 1626. In addition to the Eratosthenes Batavus he published Cycloinetria live de circuhi dimen none (1621), and Tiphys Batavus s. Histiodromice, de navium cursi bus ci re navali (1624). He also edited Coeli et s-iderum in eo errantium 011 servationes Hassiacae (1618), containing the astronomical observations of Landgrave William IV. of Hesse. A trigonometry (Doctrina triangulorum,) by him was published a year after his death. JOHN SNELL SNIPE
Encyclopedia: Willebrord Van Roijen Snell Supporter Benefits. Signup. Login. Sources. Home. Reviews. About. Questions. Forums. Contact. Encyclopedia. Correlations. Countries. Stats. Flags. Maps. Plots. Pies. Factoid 8. North Korea spends the most of its GDP on its military. Encyclopedia willebrord van Roijen snell. willebrord snell ( 15911626), also known as snell van Royen or snellius http://www.nationmaster.com/encyclopedia/Willebrord-van-Roijen-Snell
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Untitled when you have one as your index of refraction. willebrord snell, willebrord snell, studied paths of rays bends along the way. willebrord snell, willebrord snell, studied paths of rays http://hokie.us/carols2002b.doc
Snell, Willebrord snell or snellius, willebrord, vil ubrôrt snel, snelEus PronunciationKey. snell or snellius, willebrord , 15911626, Dutch mathematician. http://www.factmonster.com/ce6/people/A0845695.html
Extractions: Snell or Snellius, Willebrord u E 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,
BBC - History - Willebrord Van Roijen Snell (1580 - 1626) willebrord van Roijen snell (1580 1626). The son of a mathematicianand linguist, snell was originally intended to study law, but 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. In 1617 he published his results, stating the distance of one-degree latitude to be 28 500 roods, or 107km. This implied the earth's circumference to be 38 500km, not far from the real figure of 40 000km. He repeated the experiment at a later date, when Leyden flooded and then froze, giving him a perfectly flat baseline from which to measure.
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
Snell, Willebrord snell, willebrord van Roijen. (15801626). Holandský fyzik a optik.Je objevitelem zákona lomu. Podrobne zkoumal krivku loxodromu. http://www.aldebaran.cz/famous/people/Snell_Willebrord.html
Extractions: (Redirected from Willebrord van Roijen 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 . 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 km ). The actual distance is approximately 111 km. Snell was also a distinguished mathematician, producing a new method for calculating the first such improvement since ancient times. He discovered the law of refraction that is named after him in . He died at Leiden on the October 30 In addition to the Eratosthenes Batavus he published Cyclometria sive de circuli dimensione ), and
HighBeam Research: ELibrary Search: Results snellIUS, willebrord snellius, willebrord see snell, willebrord. 4 snell, willebrord (15801626) was a Dutch physicist at http://www.highbeam.com/library/search.asp?FN=AO&refid=ency_refd&search_thesauru
Snell Van Royen [Wat Een Wetenschap!] willebrord snell van Royen Biografie willebrord snell van Royen werd geboren in1580 in Leiden. Hij gebruikte echter snellius als wetenschappelijke naam. http://proto2.thinkquest.nl/~llc220/printalles.php?id=11
