[permalink] [id link]
Arago continued the work until 1809, his purpose being to measure a meridian arc in order to determine the exact length of a metre.
from
Wikipedia
Some Related Sentences
Arago and continued
The tradition of royal troubadours continued with his descendants Peter III James II of Aragon, the anonymous known only as " Lo bord del rei d ' Arago ", and Frederick II of Sicily.
The U. S. Coast and Geodetic Survey Office of Weights and Measures had on hand a number of metric standards, and selected the iron " Committee Meter " and the platinum " Arago Kilogram " to be the national standards for metric measurement ; the standard yard and pound previously mentioned continued to be the standards for customary measurements ( Barbrow & Judson 1976, 10 ).
Arago and work
In 1840, François Arago, the director of the Paris Observatory, suggested to the French mathematician Urbain Jean Joseph Le Verrier that he work on the topic of the planet Mercury's orbital motion around the Sun.
In the early 19th century, Brougham, a follower of Newton, launched vicious anonymous attacks in the Edinburgh Review against Thomas Young's research that proved light was a wave phenomenon that exhibited interference and diffraction, attacks that slowed acceptance of the truth for a decade until François Arago and Augustin-Jean Fresnel championed Young's work.
A similar work for the tomb of Jules Michelet ( 1879 ; designed with architect Jean-Louis Pascal ) is in Père Lachaise Cemetery, and in the same year Mercié produced the statue of Arago with accompanying reliefs, now erected at Perpignan.
Neptune's rings are named after astronomers who contributed important work on the planet: Galle, Le Verrier, Lassell, Arago, and Adams.
Beginning with the work of François Arago ( 1810 ), a series of optical experiments had been conducted, which should have given a positive result for magnitudes to first order in v / c and which thus should have demonstrated the relative motion of the aether.
Arago and until
Through 1850 they built 8 of the 38 steamships constructed in New York until that year, including the Franklin and Havre ( the first steam vessels for the Havre Line ), followed by Arago and Rhode Island ( for the government ) and Eagle and Morro Castle ( for Spofford, Tileston & Company ).
Subsequent predictions, in the media of the time, of the Earth's likely destruction overlooked the fact that the Earth itself would not reach this point until November 30, a month later, as pointed out by François Arago in an article designed to allay public fears.
He is also credited for the first observation ( 1723 ) of what is usually referred to as Poisson's spot, an observation that was unrecognized until its rediscovery in the early 19th century by Dominique Arago.
Arago and being
" Humboldt wrote of it as being seen with difficulty, and Arago similarly alluded to it ; but some now consider it brighter than formerly
Arago and measure
The latter property makes the Arago distance a useful measure of atmospheric turbidity.
Arago attempted to measure the extent to which corpuscles of light would be refracted by a glass prism at the front of a telescope.
Arago and meridian
In the early 19th century, the Paris meridian was recalculated with greater precision by the astronomer François Arago, whose name now appears on the plaques or medallions tracing the route of the meridian through Paris ( see below ).
Dominique Stezepfandts, a French conspiracy theorist, attacks the Arago medallions that supposedly trace the route of " an occult geographical line "; to him the Paris meridian is a " Masonic axis " or even " the heart of the Devil.
Arago and order
Random edge corrugation whose amplitude is of the same order as the width of that adjacent Fresnel zone reduces the Arago spot intensity.
With the aid of this coefficient also the negative result of all aether drift experiments sensible enough to detect first order effects ( such as the experiments of Arago, Fizeau, Hoek, Mascart ) can be explained.
Arago and .
In September of 1820, Ampère ’ s friend and eventual eulogist François Arago showed the members of the French Academy of Sciences the surprising discovery of Danish physicist Hans Christian Ørsted that a magnetic needle is deflected by an adjacent electric current.
* 1786 – François Jean Dominique Arago, French mathematician ( d. 1853 )
These assumptions have no obvious physical foundation but led to predictions which agreed with many experimental observations, including the Arago spot.
However, Arago, another member of the committee, performed the experiment and showed that the prediction was correct.
* The experiment of François Arago ( 1810 ), to confirm whether refraction, and thus the aberration of light, is influenced by Earth's motion.
* October 2 – François Arago, French Catalan mathematician, physicist, astronomer and politician ( b. 1786 )
* François Arago ( 1786 – 1853 ), the physicist, astronomer and liberal politician, who secured the abolition of slavery in the French colonies in 1853, was born in the nearby village of Estagel ( Estagell ) and is memorialized in the eponymous Place Arago that bears his statue in the centre of the town.
The rotation of the orientation of linearly polarized light was first observed in 1811 in quartz by French physicist François Jean Dominique Arago.
Arago spot experiment.
This bright spot is referred to as the Arago Spot or the Poisson spot.
In optics, an Arago spot, Fresnel bright spot, or Poisson spot is a bright point that appears at the center of a circular object's shadow due to Fresnel diffraction.
In astronomy, the Arago spot can be also easily observed in the strongly defocussed image of a star in a Newtonian telescope.
The presence of the Arago spot can be easily understood.
The original Arago spot experiment was carried out in the beginning of the 19th century and played an important role in the history of science.
As mentioned before the Arago spot is not easily observed in every-day situations, so it was only natural for Poisson to interpret it as an absurd result and that it should disprove Fresnel's theory.
However, the head of the committee, Dominique-François-Jean Arago, and who incidentally later became Prime Minister of France, decided to perform the experiment in more detail.
Furthermore, this means that the Arago spot is present even just a few obstacle diameters behind the disc.
The images show simulated Arago spots in the shadow of a disc of varying diameter ( 4 mm, 2 mm, 1 mm – left to right ) at a distance of 1 m from the disc.
Observation of the Arago spot with a conventional light source can be challenging.
This section summarizes how the various experimental parameters affect the visibility of the Arago spot.
For an ideal point source the intensity of the Arago spot equals that of the undisturbed wave front.
Only the width of the Arago spot intensity peak depends on the distances between source, circular object and screen, as well as the source's wavelength and the diameter of the circular object.
The main reason why the Arago spot is hard to observe in circular shadows from conventional light sources is that such light sources are bad approximations of point sources.
continued and work
He simply found more work for him to do, and the articles and reviews continued without an evident break.
However, I am recommending that development work on the B-70 air-frame and engines be continued.
National competition was the culmination of work which began with the school year last fall and continued until just before summer vacation.
Biruni's tradition of comparative cross-cultural study continued in the Muslim world through to Ibn Khaldun's work in the fourteenth century.
After the mid-1960s, he became much less prolific, but his later work — including his final two epics, Kagemusha ( 1980 ) and Ran ( 1985 )— continued to win awards, including the Palme d ' Or for Kagemusha, though more often abroad than in Japan.
From 1872 Henry continued diligently with his father's work and then intermittently in retirement in 1875.
His chief work is a Historia Francorum, or Libri v de Gestis Francorum, which deals with the history of the Franks from the earliest times to 653, and was continued by other writers until the middle of the twelfth century.
The young Carnegie continued to work for the Pennsylvania's Tom Scott, and introduced several improvements in the service.
Bohr and Mottelson continued to work together, publishing a two-volume monograph, Nuclear Structure.
As his teaching and work with the imperial chapel continued, his duties required the composition of a large number of sacred works, and in his last years it was almost exclusively in religious works and teaching that Salieri occupied himself.
Diabelli's firm continued to publish Schubert's work until 1823 when an argument between Cappi and Schubert terminated their business.
Dürer's work on the book was halted for an unknown reason, and the decoration was continued by artists including Lucas Cranach the Elder and Hans Baldung.
His work in engraving seems to have had an intimidating effect upon his German successors, the " Little Masters " who attempted few large engravings but continued Dürer's themes in small, rather cramped compositions.
The colony was still very short of skilled farmers, craftsmen and tradesmen, and the convicts continued to work as little as possible, even though they were working mainly to grow their own food.
His numerous disciples — some of whom were very influential and who, for the most part, were also disciples of Samuel — amplified and, in their capacity as instructors and by their discussions, continued the work of Rav.
As the huts stood on brick pillars, workmen just winched it back into position while work continued inside.
William Heelis continued his stewardship of their properties and of her literary and artistic work for the eighteen months he survived her.
At the age of 19, Lancaster met Nick Cravat, with whom he continued to work throughout his life.
Campbell would go on to attend Western Michigan University while he continued to work on his acting career.
Layard's work was continued by his assistant, Hormuzd Rassam and in 1852 – 1854 he went on to discover the North Palace of Ashurbanipal at Nineveh with many magnificent reliefs, including the famous Royal Lion Hunt scenes.
Since the Ris et Danseries company was disbanded circa 1993, choreographers from the company have continued with their own work.
It continued the imperialistic work of the Black Hand, using the same techniques.
Hearst did occasionally work with or pitch ideas to cartoonists, most notably his continued support of George Herriman's Krazy Kat.
Clausewitz's work is still studied today, demonstrating its continued relevance.
Pope John Paul II's apostolic constitution Divinus Perfectionis Magister of 25 January 1983, and the norms issued by the Congregation for the Causes of Saints on 7 February 1983, for its implementation on diocesan level continued the work of simplification already initiated by Pope Paul VI.
0.607 seconds.