41. Biography: Famous Physicists by Amanda Perrin. Ruska, Ernest (19061988) by Morgan Brookings,snell, willebrord (1580-1626) by Wally Bishop. Tesla, Nikola (1856 http://www.qerhs.k12.nf.ca/projects/physics/bio.htm

Biography: Famous Physicists Physics is more than just about concepts and theories, it is more than protons, electrons, energy and motion. Physics is about our attempts to understand the natural phenomena of our universe. In studying physics we are studying theories constructed by physicists; therefore, we should also strive to understand these famous physicists, as well as the era and environment which influenced their theories. For example, during the middle of the 1900's World War II influenced nuclear physics, and during the second half of the 1900's telecommunications influenced solid state physics. To better understand physics and the key people behind the theories, high school students have developed an inventory of biographies of physicists. This resource is free for others to use and we encourage all who wish to contribute. Still growing, Mar.28, 2001. Ampere, Andre (1775-1836) by Kate Tilley Archimedes (287-212 BC) by Bekki Whalen Aristotle (384-322 BC) by Crystal Smith Bernoulli, Daniel (1700-1782)

42. Willebrord Van Roijen Snell Translate this page willebrord Van Roijen snell foi um matemático holandês, que nasceuem 1591 e morreu em 1626. Era filho de um professor de Matemática http://www.brasil.terravista.pt/magoito/1866/Historia/snell.htm

Willebrord Van Roijen Snell N Bibliografia

43. WIEM: Snell Van Royen Willebrord snell van Royen willebrord, snellius (15801626), niderlandzki matematyk,astronom, fizyk i geodeta. Profesor uniwersytetu w Lejdzie (od 1613 http://wiem.onet.pl/wiem/012af0.html

WIEM 2004 - zobacz now± edycjê encyklopedii! Kup abonament i encyklopediê na CD-ROM, sprawd¼ ofertê cenow±! Oferta specjalna abonamentów dla szkó³ i instytucji! Uwaga! Przedstawione poni¿ej has³o pochodzi z archiwalnej edycji WIEM 2001! Prace redakcyjne nad edycj± 2001 zosta³y zakoñczone. Zapraszamy do korzystania z nowej, codziennie aktualizowanej i wzbogacanej w nowe tre¶ci edycji WIEM 2004 Fizyka, Matematyka, Astronomia, Geografia, Holandia Snell van Royen Willebrord Snell van Royen Willebrord, Snellius (1580-1626), niderlandzki matematyk, astronom, fizyk i geodeta. Profesor uniwersytetu w Lejdzie (od 1613). Opracowa³ zasadê pomiarów triangulacyjnych i na ich podstawie wyznaczy³ d³ugo¶æ po³udnika (1615-1617). Sformu³owa³ prawa optyki geometrycznej prawo za³amania ¶wiat³a i  prawo odbicia ¶wiat³a WIEM zosta³a opracowana na podstawie Popularnej Encyklopedii Powszechnej Wydawnictwa Fogra zobacz wszystkie serwisy do góry

44. Willebrord Snell - Encyclopedia Article About Willebrord Snell. Free Access, No More results from encyclopedia.thefreedictionary.com PPT willebrord von Roijen snell (also known as snellius) http://encyclopedia.thefreedictionary.com/Willebrord Snell

Dictionaries: General Computing Medical Legal Encyclopedia Willebrord Snell Word: Word Starts with Ends with Definition Willebrord Snell Centuries: 15th century - 16th century - 17th century Decades: 1540s 1550s 1560s 1570s 1580s - Years: 1586 1587 1588 1589 1590 - Events June - Capture of Zutphen by the Dutch under Maurice of Nassau July - Capture of Deventer by the Dutch under Maurice of Nassau August - September - Maurice maneuvers cautiously against the Duke of Parma near Arnhem Click the link for more information. Centuries: 16th century - 17th century - 18th century Decades: 1570s 1580s 1590s 1600s 1610s - Years: 1621 1622 1623 1624 1625 - Events Spanish establish a trading colony on Taiwan. Peter Minuit, director of the New Netherland colony, begins a policy of "purchasing" Manhattan from the Lenape. Work begins on building the sailing ship HMS Wasa. The Duchy of Urbino is incorporated into the Papal States. The English Parliament impeach George Villiers, 1st Duke of Buckingham, favorite of Charles I of England. Charles I dissolves Parliament.

45. AllRefer Encyclopedia - Willebrord Snellius (Mathematics, Biographies) - Encyclo Related Category Mathematics, Biographies. willebrord snellius see snell,willebrord. Topics that might be of interest to you • willebrord snell. http://reference.allrefer.com/encyclopedia/X/X-Snellius.html

AllRefer Channels :: Health Yellow Pages Reference Weather SEARCH : in Reference June 01, 2004 You are here : AllRefer.com Reference Encyclopedia Mathematics, Biographies ... Willebrord Snellius By Alphabet : Encyclopedia A-Z S Willebrord Snellius, Mathematics, Biographies Related Category: Mathematics, Biographies Willebrord Snellius see Snell, Willebrord Topics that might be of interest to you: Willebrord Snell Encyclopedia U com Check out around 175,000 brief encyclopedia articles on almost all topics. Related Categories: People Science and Technology Science and Technology Mathematics ... Biographies More articles from AllRefer Reference on Willebrord Snellius Encyclopedia U com Check out around 175,000 brief encyclopedia articles on almost all topics. Content on this web site is provided for informational purposes only. We accept no responsibility for any loss, injury or inconvenience sustained by any person resulting from information published on this site. We encourage you to verify any critical information with the relevant authorities. About Us Contact Us Privacy Links Directory ... Link to AllRefer.com

46. 105-106 (Nordisk Familjebok / Uggleupplagan. 26. Slöke - Stockholm) Print (PDF) On this page / på denna sida - snell (Snel), Johann - snell, willebrord- snell, Ludwig - snellaert, Ferdinand Augustin - snellen, Hermann http://www.lysator.liu.se/runeberg/nfcf/0073.html

Nordisk familjebok Uggleupplagan. 26. Slöke - Stockholm (1917) Tema: Reference Table of Contents / Innehåll Project Runeberg Catalog ... Print (PDF) On this page / på denna sida - Snell (Snel), Johann - Snell, Willebrord - Snell, Ludwig - Snellaert, Ferdinand Augustin - Snellen, Hermann - Snellius (Snell),Willebrord - Snellman, Johan Vilhelm Below is the raw OCR text from the above scanned image. Do you see an error? Proofread the page now! Här nedan syns maskintolkade texten från faksimilbilden ovan. Ser du något fel? Korrekturläs sidan nu! This page has never been proofread. / Denna sida har aldrig korrekturlästs. Project Runeberg, Sat May 15 18:58:36 2004 (aronsson) http://www.lysator.liu.se/runeberg/nfcf/0073.html

47. 1497-1498 (Nordisk Familjebok / 1800-talsutgåvan. 14. Ruff - Sockenstämma) Areal 75,427 har. 15,918 innev. (1889). Snehätta. Se Do vr ef j all. snell,willebrord. Se snellius. snell, Karl, tysk matematiker, född d. 19 Jan. http://www.lysator.liu.se/runeberg/nfan/0755.html

Nordisk familjebok 1800-talsutgåvan. 14. Ruff - Sockenstämma (1890) Tema: Reference Table of Contents / Innehåll Project Runeberg Catalog ... Print (PDF) On this page / på denna sida - Snarrefva ... Below is the raw OCR text from the above scanned image. Do you see an error? Proofread the page now! Här nedan syns maskintolkade texten från faksimilbilden ovan. Ser du något fel? Korrekturläs sidan nu! This page has never been proofread. / Denna sida har aldrig korrekturlästs. Project Runeberg, Sat May 15 18:55:52 2004 (aronsson) http://www.lysator.liu.se/runeberg/nfan/0755.html

48. Snell Translate this page willebrord van Roijen snell (1591 - 1626). Fue un matemático y astrónomoholandés. Nació en 1591 en Leyden. Murió el 30 de octubre http://es.geocities.com/fisicas/cientificos/fisicos/snell.htm

Willebrord van Roijen SNELL (1591 - 1626) ley de Snell http://es.geocities.com/fisicas Los autores: e fisicas@yahoo.es

49. Learn More About Willebrord Snell In The Online Encyclopedia. Visit the Online Encyclopedia and learn more and get your questions answeredabout willebrord snell. see previous page. willebrord snell. http://www.onlineencyclopedia.org/w/wi/willebrord_snell.html

You are here: Online Encyclopedia Enter a phrase or search word in the box below. You can enter multiple phrases at a time by putting a comma between each word.(e.g. cat ,dog ,lion ) Press the search button to start your search. Hint: Play with putting spaces before and after your words to see the different results you get. see previous page Willebrord Snell Willebrord Snell ), 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

50. Willebrord Snell http://www.vialattea.net/eratostene/tempesti/snellius.html

Willebrord Snell (1580-1626) Eratosthenes Batavus dove proponeva il suo metodo di triangolazione per misurare la Terra che gettava le basi della moderna geodesia.

51. List Of Physics Topics R-Z - Information Talk Slater determinant; Slope; snell s law; snell, willebrord; SO(3);Solar cell; Solar neutrino problem; Solar power; Solid; Solid state; http://www.book-spot.co.uk/index.php/List_of_physics_topics_R-Z

List of physics topics R-Z - Information Home Mathematical and natural sciences Applied arts and sciences Social sciences and philosophy ... Z R Rabi, Isidor Isaac Radiation Radiation of sound Radiation pressure ... Ryle, Sir Martin S Sakharov, Andrei Dmitrievich Salam, Abdus Felix Savart Scalar ... Szilard, Leo T T-duality T-symmetry Tachyon Tamm, Igor Yevgenyevich ... Twin paradox U U(1) Ultraviolet catastrophe Uncertainty principle Undulatory theory of light ... Unsolved problems in physics V Vacuum van der Meer, Simon van der Waals, Johannes van der Waals equation ... von Weizsäcker, Carl W W and Z bosons W boson Wallis, John Walton, Ernest Thomas Sinton ... Worldline X X-ray X-ray crystallography X-ray diffraction X-ray fluorescence ... X-ray structure Y Yang, Chen Ning Yang-Mills theory Young, Thomas Yukawa, Hideki Z Z boson Zeeman effect Zeeman, Pieter Zernike, Frits ... Zweig, George All text is available under the terms of the GNU Free Documentation License (see for details). . Wikipedia is powered by MediaWiki , an open source wiki engine.

52. Optics 5 Ray optics may be said to have begun as a science with the discovery of the lawof refraction by willebrord snell in 1621 and its description in mathematical 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.

53. The Web snell, George Davis. snell, willebrord. snelling, Fort. snellius, willebrord. Snead,Sam. Snefru. snell s law. snell, George Davis. snell, willebrord. snelling, Fort. http://www.slider.com/Enc/S/Sl.htm

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54. Ley De Snell, Formalización De Descartes Y Principio De Fermat Translate this page En tiempos más cercanos, el holandés willebrord snell (1591-1626) hizo algunosexperimentos que lo llevaron a descubrir la ley que rige el cambio de http://www.luventicus.org/articulos/02A033/

Ley de Snell, formalización de Descartes y Principio de Fermat Dr. J. J. Luetich 16 de octubre de 2002 Desde la Antigüedad se conoce el fenómeno de la refracción de la luz. Pitágoras llegó incluso a formalizar sus observaciones. En tiempos más cercanos, el holandés Willebrord Snell (1591-1626) hizo algunos experimentos que lo llevaron a descubrir la ley que rige el cambio de dirección de los rayos que pasan de un medio a otro. Según parece, Renatus Descartes (1596-1650) conocía los manuscritos de Snell y su tarea se limitó a darles forma matemática. Pero, si bien él sugirió que la luz es una onda elástica que se desplaza por el éter, respecto de la refracción sus argumentos fueron puramente geométricos. Fue Pierre de Fermat (1601-1665) quien introdujo la física al enunciar el Principio del Tiempo Mínimo, el cual unifica el estudio de la refracción y la reflexión dando una explicación más profunda. Snell Descartes Fermat Cuando las propiedades del medio en el que se desplaza un rayo de luz cambian, se produce también un cambio en su dirección. En la figura 1 se ha representado un rayo que se quiebra al producirse un cambio brusco en las propiedades del medio. Figura 1 Con la línea normal a la superficie que separa los medios de propiedades distintas, el rayo forma primero un ángulo

55. Ray Optics, willebrord snell discovered the law of refraction which is now termedsnell s law. Let us look at a simple refraction, one where http://id.mind.net/~zona/mstm/physics/light/rayOptics/refraction/snellsLaw/snell

Ray Optics, Snell's Law Refraction Lenses Ray Optics Light ... Home Willebrord Snell discovered the law of refraction which is now termed Snell's law. Let us look at a simple refraction, one where a light ray travels from air into water: Conventions in such a diagram work this way: The incident medium, air in this case, is called the first medium, or medium 1. The angle of incidence is named with the Greek letter theta, and, since it is in medium 1, is called theta The refracted medium, water in this case, is called the second medium, or medium 2. The angle of refraction, again named with the Greek letter theta, is called theta In the above diagram approximate values for the angles are: theta = 43 degrees theta = 31 degrees Now, if you divide the sine of theta 1 by the sine of theta 2 you get: sin(43 degrees) / sin(31 degrees) = 1.32 In actual practice, using exact values for the angles, you would get: sin(theta ) / sin(theta As it turns out, this ratio is always equal to 1.33 for any angle of incidence and its corresponding angle of refraction. This is our first look at Snell's law. It could be stated this way: For a light ray going from air into water, the sine of the angle of incidence divided by the sine of the angle of refraction is constant, that is, the ratio is always equal to the same value:

56. Short Biographies : Si snell, willebrord van Roijen 1580 30 Oct 1626 Dutch An astronomerand mathematician best known for his law of refraction of light. http://www.hallym.ac.kr/~physics/reference/physicist/Si.html

Snell , Willebrord van Roijen 1580 - 30 Oct 1626 Dutch 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 Origin Sommerfeld , Arnold Johannes Wilhelm 5 Dec 1868 - 26 Apr 1951 German He worked on wave mechanics and thermodynamics. He was taught by

57. Snell's Law and the angles that the reflected and transmitted rays make (the angles of reflectionand transmission, respectively) was discovered by willebrord snell. http://www.earth.nwu.edu/people/seth/demos/SNELL/snell.html

Snell's Law Demonstration goals: Demonstrate Snell's Law Show that the the coefficients of reflection and transmission depend on incidence angle One of our most important methods for learning about the Earth's interior is the study of seismic waves ; energy that travels through the Earth in the form of sound. The existence of the Mohorovicic layer, the liquid outer core of the Earth and the solid inner core were all deduced from sound waves that had traveled through the Earth, interacting with the layers. Because of the way that seismic energy propagates through the Earth, we know that the entire interior, with the sole exception of the outer core, is solid. In mineralogy , the way that light is transmitted through a crystal is a diagnostic tool. By measuring the refractive index (the way the light bends as it moves from mineral to another) and the motion of Becke lines , a mineralogist can determine the difference between crystals of quartz and calcite. But how are these differences detected? And what causes them? When a wave of energy comes to a place where two layers meet (called an interface ), the energy can go two directions. If the energy bounces off of the interface and stays in the first medium, then it is said to be

58. List Of Physics Topics R-Z Singularvalue decomposition; Slope; snell s law; snell, willebrord;SO(3); Solar cell; Solar neutrino problem; Solar power; Solid; Solidstate; http://www.fact-index.com/l/li/list_of_physics_topics_r_z.html

Main Page See live article Alphabetical index List of physics topics R-Z A B C D E F G H I J K L M N O P Q R S T U ... Z R Rabi, Isidor Isaac Radiation Radiation of sound Radiation pressure ... Raman spectroscopy Ramsey, Norman Rayleigh Rayleigh scattering Rayleigh-Taylor Rayleigh, Lord Reflection Reflection coefficient Refractive index ... Redshift Reines, Frederik Renormalization Resistance Resolution of the identity Resonance Rest mass Reynolds, Osbourne Reynolds number Ricci tensor Richardson, Owen Willans Richardson, Robert C Richardson number Richter, Burton Richtmyer-Meshkov Riemann, Bernhard Riemannian geometry Riemannian manifold Ring wave guide Robertson, Howard Percy Rohrer, Heinrich Röntgen, Wilhelm Conrad Rosen, Nathan Rotation Rotation group Rotation operator Rotational invariance Rubbia, Carlo Ruska, Ernst Rutherford cross section Rutherford scattering Rutherford, Ernest Rydberg, Johannes Ryle, Sir Martin S Sakharov, Andrei Dmitrievich Salam, Abdus Felix Savart Scalar Scalar field Scanning tunneling microscope Scattering ... Schrödinger, Erwin Schwartz, Melvin Schwarzschild, Karl

59. Snell willebrord snell studied law at the University of Leiden but was very interestedin mathematics and taught mathematics even while he studied law. http://intranet.woodvillehs.sa.edu.au/pages/resources/maths/History/Snll.htm

Willebrord van Roijen Snell Born: 1580 in Leiden, Netherlands Died: 30 Oct 1626 in Leiden, Netherlands Show birthplace location Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Welcome page 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 by polygons. Using his method 96 sided polygons give

60. Encyclopædia Britannica snell, Peter (NZ athlete), snell, Peter George (NZ athlete) see snell, Peter,snell, willebrord van Roijen (Du. astron. and math.), snellen chart (optometry), http://www.britannica.com/eb/index?search=Sn

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