41. Willebrord Snell - Wikipedia, The Free Encyclopedia law Information From Answers.comsnell s law snell s law is the simple formula used to calculate the refraction of it was discovered yet another time, by either willebrord snell or René http://en.wikipedia.org/wiki/Willebrord_Snell

Wikimedia needs your help in the final days of its fund drive. See our fundraising page The Red Cross and other charities also need your help. Willebrord Snell From Wikipedia, the free encyclopedia. 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 —two 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

42. 1621: Information From Answers.com willebrord snell discovers that refraction of light is determined by the sine ofthe angle made by the incident ray (snell s law). See also 1637 Physics. http://www.answers.com/topic/1621

showHide_TellMeAbout2('false'); Arts Business Entertainment Games ... More... On this page: US Literature Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping In the year Biology Hieronymus Fabricius's De formatione ovi et pulli ("on the development of eggs and chickens"), published posthumously, elevates embryology to the level of a science. See also 1651 Biology Computers About this time William Oughtred [b. Eton, England, March 5, 1574, d. Albury, Surrey, England, June 30, 1660] invents the slide rule (according to Oughtred's statement in 1632). See also 1620 Computers 1623 Computers Pilgrim settlers in Massachusetts observe that Native Americans bury a dead fish in each hill of maize (corn) planted to ensure a good yield. See also Materials Lead mining begins in the United States. Lord Dudley obtains a patent for a method of making iron using coal instead of charcoal. The method is invented by his natural son Dud Dudley [b. Worcestershire, England, 1599, d. Worcester, October 25, 1684]. See also 1611 Materials 1665 Materials Mathematics The famous edition of Diophantus's Arithmetica ("arithmetic") is published in Greek with a Latin translation, launching the revival of number theory; it is best known for having too narrow a margin to accommodate Fermat's "last theorem."

43. Math Lessons - Willebrord Snell Math Lessons willebrord snell. willebrord snell (1580 – October 30, 1626),also known as snell van Royen or snellius, was a Dutch astronomer and http://www.mathdaily.com/lessons/Willebrord_Snell

Search Mathematics Encyclopedia and Lessons Lessons Popular Subjects algebra arithmetic calculus equations ... more References applied mathematics mathematical games mathematicians more ... 1626 deaths 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 km ). The actual distance is approximately 111 km. Snell was also a distinguished mathematician, producing a new method for calculating . He died at Leiden on October 30 In addition to the Eratosthenes Batavus he published Cyclometria sive de circuli dimensione ), and

44. The Gauss’s Law Song I sing of the genius of willebrord snell He wrote down snell’s law, his greatgift to the age! But we prefer willebrord van Roijen snell http://www.haverford.edu/physics-astro/songs/snelllyrics.htm

Snell’s Law Song Tune: Sweet Betsy from Pike (traditional) C C C Come listen and learn, I’ve a story I tell, C Am G I sing of the genius of Willebrord Snell C Em F C A mathematician who lived long ago C C C In the Netherlands where the Rhine river does flow. Willebrord van Roijen Snell (Note that the first name is actually pronounced “Villbrort”, but in the song is pronounced “Vill-e-brort”.) C C C He set for his mind occupations of worth, C Am G Improved navigation and measured the Earth! C Em F C He gave us the sine law, that wonderful guy, C C C And he made more precise calculation of pi! C F (or C) G (or G7) Am (or C) Singin’ n1 sine theta-sub-1, hey, hey, hey, C F (or C) G (or G7) C Equals n2 sine theta-sub-2, hip hooray! C C C His greatest feat came in Sixteen Twenty-one, C Am G When optics as science was really begun! C Em F C While flashes of lightning illumined his page, C C C He wrote down Snell’s law, his great gift to the age! C C C So if you wear glasses or like to fry ants, C Am G Be grateful your lenses were not made by chance! C Em F C Astronomers hail him with each new-found star!

45. Snell's Law -- Facts, Info, And Encyclopedia Article about willebrord van Roijen snell) willebrord van Roijen snell (15801626) . by either willebrord snell or (French philosopher and mathematician; http://www.absoluteastronomy.com/encyclopedia/s/sn/snells_law.htm

var dc_UnitID = 10; var dc_PublisherID = 512; var dc_BackgroundColor1 = 'white'; var dc_BackgroundColor2 = 'white'; var dc_TitleColor = 'blue'; var dc_TextColor = 'black'; var dc_URLColor = 'blue'; var dc_URLVisitedColor = 'green'; var dc_sm_type = 'horizontal'; var dc_Width = 700; var dc_Height = 75; var dc_caption_font_bgColor = 'white'; var dc_caption_font_color = 'blue'; var dc_OutBorder = 'no'; var dc_adprod='TM'; Snell's law [Categories: Introductory physics, Optics] Snell's law is the simple formula used to calculate the (The change in direction of a propagating wave (light or sound) when passing from one medium to another) refraction of light when travelling between two media of differing (The ratio of the velocity of light in a vacuum to that in a medium) refractive index . It is named for its discoverer, (The West Germanic language of the Netherlands) Dutch mathematician (Click link for more info and facts about Willebrord van Roijen Snell) Willebrord van Roijen Snell Overview In the diagram on the right, two media of refractive indices

46. PSIgate - Physical Sciences Information Gateway Search/Browse Results You searched for willebrord* +snell, (subject(s) All ). The site providesa short biography of willebrord snell (1580-1626) who proposed the method of http://www.psigate.ac.uk/roads/cgi-bin/psisearch.pl?term1=Willebrord Snell,&limi

47. PSIgate - Physical Sciences Information Gateway Search/Browse Results The site provides a short biography of willebrord snell (15801626) who proposedthe method of triangulation, discovered the law of refraction and studied http://www.psigate.ac.uk/roads/cgi-bin/psisearch.pl?term1=Snell law&subject=All&

48. Physicists snell, willebrord (15911626) willebrord snell, a professor at Leyden, discoveredthe law of refraction empirically in 1621. http://www.physics.northwestern.edu/ugrad/vpl/physicists.html

Physicists Index Atomic Physics Mechanics Optics ... Waves Brewster, David Sir David Brewster made the first empirical determination of what is now know as Brewster's angle in 1812. Descartes, Rene Rene Descartes was the first to publish the law of refraction in terms of sines. Fermat, Pierre de Pierre de Fermat formulated the now famous principle of least time in 1657. Fresnel, Augustin Jean French physicist Augustin Jean Fresnel made the first calculation of diffraction patters from various obstacles. Galilei, Galileo Galileo Galilei was an Italian astronomer, physicist, and mathematician, is the father of kinematics. After building one of the first telescopes, Galileo discovered four moons of Jupiter in 1610. Huygens, Christiaan Dutch physicist Christiaan Huygens, discovered the phenomena of polarization, derived the laws of reflection and refraction, and formulated what is now known as Huygens principle Kepler, Johannes In addition to his work on celestial mechanics, Kepler made the first discovery of total internal reflection sometime before 1611. Maxwell, James Clerk

49. Snellen Test - Definition Of Snellen Test By The Free Online Dictionary, Thesaur snell, George Davis snell, Hannah snell, willebrord snellegem snellen snellen snellen snellen chart snellen chart snellen chart http://www.thefreedictionary.com/Snellen test

Domain='thefreedictionary.com' word='Snellen test' Your help is needed: American Red Cross The Salvation Army join mailing list webmaster tools Word (phrase): Word Starts with Ends with Definition subscription: Dictionary/ thesaurus Computing dictionary Medical dictionary Legal dictionary Financial dictionary Acronyms Columbia encyclopedia Wikipedia encyclopedia Hutchinson encyclopedia Snellen test Also found in: Medical Wikipedia 0.02 sec. Page tools Printer friendly Cite / link Email Feedback Snellen test n. A test for visual acuity using a Snellen chart. Thesaurus Legend: Synonyms Related Words Antonyms Noun Snellen test - a test of visual acuity using a Snellen chart run test trial - the act of testing something; "in the experimental trials the amount of carbon was measured separately"; "he called each flip of the coin a new trial" Mentioned in References in classic literature No references found No references found Dictionary/thesaurus browser Full browser sneezewort sneezing sneezy Sneffels ... Snellen chart Snellen test Snet Snew SNG snib ... Snel, Willebrord van Roijen

50. Snellen - Definition Of Snellen By The Free Online Dictionary, Thesaurus And Enc snell s law snell s law snell s law snell, Bertrand Hollis snell, GeorgeDavis snell, George Davis snell, Hannah snell, willebrord snellegem http://www.thefreedictionary.com/Snellen

Domain='thefreedictionary.com' word='Snellen' Your help is needed: American Red Cross The Salvation Army join mailing list webmaster tools Word (phrase): Word Starts with Ends with Definition subscription: Dictionary/ thesaurus Computing dictionary Medical dictionary Legal dictionary Financial dictionary Acronyms Columbia encyclopedia Wikipedia encyclopedia Hutchinson encyclopedia Snellen Also found in: Wikipedia Hutchinson 0.02 sec. Page tools Printer friendly Cite / link Email Feedback Thesaurus Legend: Synonyms Related Words Antonyms Noun Snellen - Dutch ophthalmologist who introduced the Snellen chart to study visual acuity (1834-1908) Hermann Snellen eye doctor ophthalmologist oculist - a medical doctor specializing in the treatment of diseases of the eye Mentioned in References in classic literature acuity blind display eye doctor ... More results No references found Dictionary/thesaurus browser Full browser sneezeweed yarrow Sneezewood sneezewort sneezing ... snell Snellen Snellen chart Snellen test Snet Snew ... Snellegem Snellen Snellen chart Snellen chart Snellen chart Snellen test ... Snelling, Fort

51. Optics 5 willebrord snell (15801626) switched from the study of law to mathematics.and he eventually succeeded his father as professor of mathematics at the http://www.ee.umd.edu/~taylor/optics5.htm

....Optics Highlights V Ray Optics, Corpuscles and Waves R Willebrord Snell René Descartes (1596-1650) was the great philosopher and mathematician of the first half of the 17 th century. Although he was nominally a Roman Catholic and held rank in the lower nobility, he spent much of his adult life outside of France, principally in the Protestant low countries, seemingly in fear of the persecutions of heretics that swept France. Indeed, his works were put on the proscribed list shortly after his death. Cartesian physics was mechanistic and deterministic, all matter and light consisted of infinitely divisible substances, set into initial vortice-like motion by God. Light was described as consisting of tiny globes that travel and bounce according to the laws of optics; color was due to the different spins of the globes Pierre de Fermat (1601-1665) the son of a leather merchant, studied law at the University of Toulouse and worked as a lawyer and councilor to the local parliament in Toulouse. He devoted his free time to mathematics. He only published one minor paper, and his work in number theory, probability, and geometry would have been lost had his son not published his letters and notes after his death. Fermat corresponded with both Descartes and Pascal. It is said that Descartes was enraged when he sent him his work on the principle of least time and criticized Descartes work on optics, which was based on the assumption that light travels faster in a denser medium.

52. Oilfield Glossary: Term 'Snell's Law' snell s law, one of two laws describing refraction, was formulated in the context It is named for willebrord Snel (1580 to 1626), a Dutch mathematician. http://www.glossary.oilfield.slb.com/Display.cfm?Term=Snell's law

53. Snell Physics Faces. willebrord snell (15801626) discovered the law of refraction. http://faculty.rmwc.edu/tmichalik/snell.htm

Physics Faces Willebrord Snell (1580-1626) discovered the law of refraction.

54. La Matematica Antica Su CD-ROM Translate this page snell, willebrord - Cyclometricus. Lione, Elsevier, 1621. CD numero 3 snell,willebrord - Doctrinae triangulorum canonicae libri quattuor. http://www.digento.de/zusatz/100109_01.html

Startseite Kontakt Impressum Newsletter ... La matematica antica su CD-ROM CD numero 1 - Bernoulli, Johann - Opera. Losanna e Ginevra, Bousquet, 1747. - Hermann, Jacob - Phoronomia. Amsterdam, Wetsten, 1716. - Lagrange, Joseph Louis - Mecanique analytique. Parigi, Courcier, 1811. - Lagrange, Joseph Louis - Theorie des fonctions analytiques. Parigi, Impr. De la Republique, 1797. - Mascheroni, Lorenzo - Adnotationes ad calculum integralem Euleri. Pavia, Galeazzi, 1790. - Monge, Gaspard - Geometrie descriptive. Parigi, Baudouin, 1799. - Papin, Denis - Nouvelle maniere pour lever l'eau. Kassel, Estienne, 1707. - Ruffini, Paolo - Teoria generale delle equazioni. Bologna, S. Tommaso, 1799. - Simpson, Thomas - A treatise on Algebra. Londra, Nourse, 1745. CD numero 2 - Anderson, Alexander - Ad angularium sectionum analyticen. Parigi, Varennes, 1615. - Anderson, Alexander - Exercitationum mathematicarum decas prima. Parigi, Varennes, 1619. - Boulliau, Ismael - De lineis spiralibus. Parigi, Cramoisy, 1657.

55. Primary Sources - Other Electronic Formats - Scientific Revolution Home Page: Re Translate this page Oxford, Lichfield, 1621. snell, willebrord - Cyclometricus. Lione, Elsevier, 1621 . snell, willebrord - Doctrinae triangulorum canonicae libri quattuor. http://web.clas.ufl.edu/users/rhatch/pages/03-Sci-Rev/SCI-REV-Home/research-page

Scientific Revolution; Information, Bibliography, Resources, Readings, Biography, Sources, Links T H E S C I E N T I F I C R E V O L U T I O N E L E C T R O N I C P R I M A R Y T E X T S - O T H E R F O R M A T S Professor Robert A. Hatch - University of Florida o VER the last several decades a number of extraordinary primary sources have been available in electronic format. Many primary printed sources have appeared in PDF format, some have been digitized. Many are available for purchase on CD, privately or through your university or local library. The following suggestive, as the number of texts is extensive and growing. If readers know of additional primary texts available in CD or other electronic format, kindly send information to the email address below. Thank you. RAH Historical Mathematics - Index of Contents Compact Disk Number 1 Bernoulli, Johann - Opera. Losanna e Ginevra, Bousquet, 1747.

56. Snell Translate this page willebrord van Roijen snell (1591 - 1626) Conocido también con los nombresde snellius y Snel van Roijen, W.snell viajó por Europa y entró en contacto, http://es.geocities.com/fisicas/cientificos/fisicos/snell.htm

57. Enciclopedia :: 100cia.com Translate this page willebrord snell. willebrord snell van Royen (Leiden, 1580 - 30 de octubre de1626), también conocido como snellius, fue un astrónomo y matemático holandés http://100cia.com/enciclopedia/Willebrord_Snell

Portada Artículos favoritos Vea sus documentos y artículos favoritos pulsando aquí No hay artículos favoritos todavía. documentos sin leer: Siguiente doc sin leer Borrar los docs leídos Borrar todos los docs ¡Webmaster! ¿Quieres tener los contenidos de 100cia.com en tu página? Pulsa aquí Buscar: en Google en noticias en Enciclopedia Estás en: 100cia.com > Enciclopedia Willebrord Snell Willebrord Snell van Royen Leiden 30 de octubre de ), también conocido como Snellius , fue un astrónomo y matemático holandés célebre por la ley de la refracción que lleva su nombre. A pesar de comenzar los estudios de Derecho en la Universidad de Leiden mostró un gran interés por las matemáticas, disciplina que ya enseñaba incluso mientras cursaba sus estudios. En sustituyó a su padre, Rudolph Snell ( ), como profesor de matemáticas en la Universidad de Leyden. En planeó y llevó a cabo un nuevo método para medir el radio de la Tierra por medio de la determinación de la longitud de un arco de meridiano calculado mediante triangulación, trabajo considerado la fundación de la geodesia ; en su obra Eratosthenes Batavus, sive de terræ ambitus vera quantitate

58. Willebrord Snell Van Royen [Wat Een Wetenschap!] willebrord snell van Royen. Natuurkunde Meer over snell van Royen. wet vansnellius snell van Royen (ScienceWorld) http://proto2.thinkquest.nl/~llc220/wetenschapper.php?id=11

59. Snell Van Royen [Wat Een Wetenschap!] willebrord snell van Royen werd geboren in 1580 in Leiden. Hij gebruikte echtersnellius als wetenschappelijke naam. Hij studeerde aan de universiteit in http://proto2.thinkquest.nl/~llc220/printalles.php?id=11

60. JOHN SNELL - LoveToKnow Article On JOHN SNELL HANNAH snell willebrord snell ». To properly cite this JOHN snell article inyour work, copy the complete reference below. JOHN snell. http://84.1911encyclopedia.org/S/SN/SNELL_JOHN.htm

JOHN SNELL SNELL, JOHN (1629-1679), founder of the Snell exhibitions at Oxford, was born in 1629 in Ayrshire, Scotland, the son of a blacksmith. He joined the royalists during the civil war, and fought in several battles, including Worcester. Thereafter he took refuge in Cheshire, where he met Sir Orlando Bridgeman, whose clerk he became, being raised to the offices of court-crier and seal-bearer as his patron was promoted to those of judge and Lord Keeper. Later he was secretary to the Duke of Monmouth and had the management of his Scottish estates. He died at Oxford on the 6th of August 1679, leaving a bequest for sending students from Glasgow University to an Oxford college or hall. The Court of Chancery decided in 1693 that Balliol should receive the beneficiaries. HANNAH SNELL WILLEBRORD SNELL To properly cite this JOHN SNELL article in your work, copy the complete reference below: "JOHN SNELL." LoveToKnow 1911 Online Encyclopedia. http://84.1911encyclopedia.org/S/SN/SNELL_JOHN.htm Links to this article are encouraged. Please use the following format: See: JOHN SNELL at LoveToKnow.

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