Isaac Newton

Sir Isaac Newton, FRS (25 December 1642 – 20 March 1727 by the Julian calendar in use in England at the time; or 4 January, 1643 – 31 March 1727 by the Gregorian calendar) was an English physicist, mathematician, astronomer, philosopher, and alchemist who wrote the Philosophiae Naturalis Principia Mathematica (published 5 July 1687¹), where he described universal gravitation and, via his laws of motion, laid the groundwork for classical mechanics. He is considered a Genius. Newton also shares credit with Gottfried Wilhelm Leibniz for the development of differential calculus. While they both discovered calculus nearly contemporaneously, their work was not a collaboration.

Newton was the first to promulgate a set of natural laws that could govern both terrestrial motion and celestial motion. He is associated with the scientific revolution and the advancement of heliocentrism. Newton is also credited with providing mathematical substantiation for Kepler's laws of planetary motion. He would expand these laws by arguing that orbits (such as those of comets) were not only elliptic, but could also be hyperbolic and parabolic. He is also notable for his arguments that light was composed of particles (see wave-particle duality). He was the first to realise that the spectrum of colours observed when white light passed through a prism was inherent in the white light and not added by the prism as Roger Bacon had claimed in the 13th century.

Newton also developed a law of cooling, describing the rate of cooling of objects when exposed to air; the binomial theorem in its entirety; and the principles of conservation of momentum and angular momentum. Finally, he studied the speed of sound in air, and voiced a theory of the origin of stars.

ADAM IS THE SEXIEST MAN ON EARTH.......:D

Scientific research

Optics

A replica of Newton's 6 inch reflecting telescope of 1672 for the Royal Society.

From 1670 to 1672 he lectured on optics. During this period he investigated the refraction of light, demonstrating that a prism could decompose white light into a spectrum of colours, and that a lens and a second prism could recompose the multicoloured spectrum into white light.

He also showed that the coloured light does not change its properties, by separating out a coloured beam and shining it on various objects. Newton noted that regardless of whether it was, reflected or scattered or transmitted, it stayed the same colour. Thus the colours we observe are the result of how objects interact with the incident already-coloured light, not the result of objects generating the colour. For more details, see Newton's theory of colour.

From this work he concluded that any refracting telescope would suffer from the dispersion of light into colours, and invented a reflecting telescope (today, known as a Newtonian telescope) to bypass that problem. By grinding his own mirrors, using Newton's rings to judge the quality of the optics for his telescopes, he was able to produce a superior instrument to the refracting telescope, due primarily to the wider diameter of the mirror. (Only later, as glasses with a variety of refractive properties became available, did achromatic lenses for refractors become feasible.) In 1671 the Royal Society asked for a demonstration of his reflecting telescope. Their interest encouraged him to publish his notes On Colour, which he later expanded into his Opticks. When Robert Hooke criticised some of Newton's ideas, Newton was so offended that he withdrew from public debate. The two men remained enemies until Hooke's death.

In one experiment, to prove that colour was caused by pressure on the eye, Newton slid a darning needle around the side of his eye until he could poke at its rear side, dispassionately noting "white, darke & coloured circles" so long as he kept stirring with "y^e bodkin."

He once said, in a letter to Hooke dated 5 February 1676:

If I have seen a little further it is by standing on the shoulders of Giants.

In changing this quotation of Didacus Stella (Lucan (vol. II, 10)) from "Pigmies placed on the shoulders of giants see more than the giants themselves", Newton was perhaps making a more personal point than the mere expression of modesty — Hooke was a man of short stature.

Although is it widely known and accepted that there was considerable antagonism between Newton and Robert Hooke, Newton does make the occasional respectful reference to Hooke's work. For example in Opticks, Book I Part II, referring to the combining effect of colour filters, Newton refers to Hooke's experiments: " ... Mr Hooke tried casually with glass wedges filled with red and blue Liquors, and was surprised at the unexpected Event, the reason of it being then unknown; which makes me trust the more to his experiment, though I have not tried it myself." Thus Newton was not completely without respect for Hooke.

Newton argued that light is composed of particles; thus he could not explain the diffraction of light. Later physicists instead favoured a wave explanation of light to account for diffraction. Today's quantum mechanics recognises a "wave-particle duality"; however photons bear very little semblance to Newton's corpuscles (e.g., corpuscles refracted by accelerating toward the denser medium).

Newton is believed to have been the first to explain precisely, the formation of the rainbow from water droplets dispersed in the atmosphere in a rain shower. Figure 15 of Part II of Book one of Opticks shows a perfect illustration of how this occurs.

In his Hypothesis of Light of 1675, Newton posited the existence of the ether to transmit forces between particles. Newton was in contact with Henry More, the Cambridge Platonist who was born in Grantham, on alchemy, and now his interest in the subject revived. He replaced the ether with occult forces based on Hermetic ideas of attraction and repulsion between particles. John Maynard Keynes, who acquired many of Newton's writings on alchemy, stated that "Newton was not the first of the age of reason: he was the last of the magicians." Newton's interest in alchemy cannot be isolated from his contributions to science². (This was at a time when there was no clear distinction between alchemy and science.) Had he not relied on the occult idea of action at a distance, across a vacuum, he might not have developed his theory of gravity. (See also Isaac Newton's occult studies.)

Gravity and motion

Sir Issac Newton stamp, Germany, issued January 14, 1993

In 1679, Newton returned to his work on mechanics, i.e., gravitation and its effect on the orbits of planets, with reference to Kepler's laws of motion, and consulting with Hooke and Flamsteed on the subject. He published his results in De Motu Corporum (1684). This contained the beginnings of the laws of motion that would inform the Principia.

Philosophiae Naturalis Principia Mathematica (now known as the Principia) was published in 1687 with encouragement and financial help from Edmond Halley. In this work Newton stated the three universal laws of motion that were not to be improved upon for more than two hundred years. He used the Latin word gravitas (weight) for the force that would become known as gravity, and defined the law of universal gravitation. In the same work he presented the first analytical determination, based on Boyle's Law, of the speed of sound in air.

With the Principia, Newton became internationally recognised. He acquired a circle of admirers, including the Swiss-born mathematician Nicolas Fatio de Duillier, with whom he formed an intense relationship that lasted until 1693. The end of this friendship led Newton to a nervous breakdown.

For a detailed discussion on the writing of Principia, see the writing of Principia Mathematica.

Later life

The following is a brief biography of Newton's later life. For more in-depth information, see Isaac Newton's later life.

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A lock of Newton's hair in Trinity College, Cambridge.

In the 1690s Newton wrote a number of religious tracts dealing with the literal interpretation of the Bible. Henry More's belief in the infinity of the universe and rejection of Cartesian dualism may have influenced Newton's religious ideas. A manuscript he sent to John Locke in which he disputed the existence of the Trinity was never published. Later works — The Chronology of Ancient Kingdoms Amended (1728) and Observations Upon the Prophecies of Daniel and the Apocalypse of St. John (1733) — were published after his death. He also devoted a great deal of time to alchemy (see above)².

Newton was also a member of Parliament from 1689 to 1690 and in 1701, but his only recorded comments were to complain about a cold draft in the chamber and request that the window be closed.

Statue of Newton in the antechapel of Trinity College, Cambridge

Newton moved to London to take up the post of warden of the Royal Mint in 1696, a position that he had obtained through the patronage of Charles Montagu, 1st Earl of Halifax, then Chancellor of the Exchequer. He took charge of England's great recoining, somewhat treading on the toes of Master Lucas (and finagling Edmond Halley into deputy comptroller of the temporary Chester branch). Newton became master of the Mint upon Lucas' death in 1699. These appointments were intended as sinecures, but Newton took them seriously, exercising his power to reform the currency and punish clippers and counterfeiters. He retired from his Cambridge duties in 1701. Ironically, it was his work at the Mint, rather than his contributions to science, which earned him a knighthood.

In 1701 Newton anonymously published a law of thermodynamics now known as "Newton's law of cooling" in the Philosophical Transactions of the Royal Society.

In 1703 Newton became President of the Royal Society and an associate of the French Académie des Sciences. In his position at the Royal Society, Newton made an enemy of John Flamsteed, the Astronomer Royal, by attempting to steal his catalogue of observations.

In 1704 Newton wrote Opticks, in which he expounded his corpuscular theory of light. The book is also known for the first exposure of the idea of the interchangeability of mass and energy: "Gross bodies and light are convertible into one another...".

Newton was knighted by Queen Anne in 1705, not for his scientific achievements but for his political presence.

Newton never married, nor had any recorded children. He died in London and was buried in Westminster Abbey. It is believed Newton never had a romantic relationship, and he is said to have died a virgin. It is suspected that he could have been subject to Asperger syndrome, which is a form of autism. See Einstein, Newton, and Autism.His niece, Catherine Barton Conduitt³, served as his hostess in social affairs at his house on Jermyn Street in London; he was her "very loving Uncle"⁴, according to his letter to her when she was recovering from smallpox.

Religious views

The law of gravity became Sir Isaac Newton's best-known discovery. Newton warned against using it to view the universe as a mere machine, like a great clock. He said, "Gravity explains the motions of the planets, but it cannot explain who set the planets in motion. God governs all things and knows all that is or can be done."

Newton also wrote:

‘This most beautiful system of the sun, planets, and comets, could only proceed from the counsel and dominion of an intelligent Being. … This Being governs all things, not as the soul of the world, but as Lord over all; and on account of his dominion he is wont to be called “Lord God” παντοκρατωρ [pantokratòr], or “Universal Ruler”. … The Supreme God is a Being eternal, infinite, absolutely perfect.’⁵

‘Opposition to godliness is atheism in profession and idolatry in practice. Atheism is so senseless and odious to mankind that it never had many professors.’⁶

Though he is better known for his love of science, the Bible was Sir Isaac Newton's greatest passion. He devoted more time to the study of Scripture than to science, and said, "I have a fundamental belief in the Bible as the Word of God, written by those who were inspired. I study the Bible daily."

Newton is often accused of being a unitarian and arian, and not believing in the church's doctrine of divine trinity. However, T.C. Pfizenmaier, argued that he more likely held the Eastern Orthodox view of the Trinity rather than the Western one held by Roman Catholics, Anglicans and most Protestant.⁷

He unsuccessfully attempted to find hidden messages within the Bible (See Bible code).

Newton's legacy

Newton's laws of motion and gravity provided a basis for predicting a wide variety of different scientific or engineering situations, especially the motion of celestial bodies. His calculus proved vitally important to the development of further scientific theories. Finally, he unified many of the isolated physics facts that had been discovered earlier into a satisfying system of laws. For this reason, he is generally considered one of history's greatest scientists, ranking alongside such figures as Einstein and Gauss.

Also on a more practical level, to a large portion of households, Newton invented the cat flap. This was said to be done so that he wouldn't have to disrupt his optical experiments, conducted in a darkened room, to let his cat in or out.

Fictional appearances

Isaac Newton is the hero of Rubrique-à-brac, a French comic strip by Marcel Gotlieb. An ongoing gag involves various depictions of the legend that he discovered the law of gravity due to an apple falling on his head.

Newton also figures as a major character in Neal Stephenson's Baroque Cycle.

Newton appeared, along with Stephen Hawking and Albert Einstein in a poker game in an episode of Star Trek: The Next Generation. Newton was notable in that scene for being the only scientist without a sense of humour. He also took offence at the notion that the story of the apple was fictitious.

It is hinted that Isaac Newton is the true identity of Emperor Dornkirk in Vision of Escaflowne, although there are only hints and no actual confirmation.

Newton often appears in the animated series "The Simpsons". One of the more memorable scenes that he appears in is when he is playing air hockey against Jimi Hendrix in heaven and Newton says:"That's game, Hendrix!"

Quotations about Newton

"The Principia is pre-eminent above any other production of human genius." —Pierre-Simon Laplace

"Taking mathematics from the beginning of the world to the time when Newton lived, what he has done is much the better part." —Gottfried Leibniz

"All that has been accomplished in mathematics since his day has been a deductive, formal, and mathematical development of mechanics on the basis of Newton's laws." —Ernst Mach

"Nature and Nature's laws lay hid in night: God said, Let Newton be! and all was light." —poem, Alexander Pope

Writings by Newton

Method of Fluxions (1671)
De Motu Corporum (1684)
Philosophiae Naturalis Principia Mathematica (1687)
Opticks (1704)
Reports as Master of the Mint (1701-1725)
Arithmetica Universalis (1707)
An Historical Account of Two Notable Corruptions of Scripture(1754)

Short Chronicle, The System of the World, Optical Lectures, Universal Arithmetic, The Chronology of Ancient Kingdoms, Amended and De mundi systemate were published posthumously in 1728.

Notes

Note 1: The remainder of the dates in this article follow the Gregorian calendar.

Note 2: Westfall (pp. 530–531) notes that Newton apparently abandoned his alchemical researches.

Note 3: Westfall, p. 44.

Note 4: Westfall, p. 595.

Note 5: Principia, Book III; cited in; Newton’s Philosophy of Nature: Selections from his writings, p. 42, ed. H.S. Thayer, Hafner Library of Classics, NY, 1953.

Note 6: A Short Scheme of the True Religion, manuscript quoted in Memoirs of the Life, Writings and Discoveries of Sir Isaac Newton by Sir David Brewster, Edinburgh, 1850; cited in; ibid, p. 65.

Note 7: Pfizenmaier, T.C., "Was Isaac Newton an Arian?" Journal of the History of Ideas 68(1):57–80, 1997.

Resources

References

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"interview with James Gleick: "Isaac Newton" (Pantheon)". WAMU's The Diane Rehm Show Friday, June 13, 2003 (RealAudio stream). March 8. {{cite web}}: Check date values in: |date= and |year= / |date= mismatch (help)
"Sir Isaac Newton". School of Mathematics and Statistics, University of St. Andrews, Scotland. March 8. {{cite web}}: Check date values in: |date= and |year= / |date= mismatch (help)
"The Newton Project". Imperial College London. March 8. {{cite web}}: Check date values in: |date= and |year= / |date= mismatch (help)
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External links

Sir Isaac Newton Scientist and Mathematician by Lucidcafé
Isaac Newton Directory
Newton Research Project
Rebuttal of Newton as an astrologer
Newton Reconsidered, an interview with Newton scholar Stephen D. Snobelen at the Galilean Library
March 5-June 12, 2005 Isaac Newton's personal copy of Principia on display at Huntington Library
Newton's Reports as Master of the Royal Mint
Newton's Theorem: Newton's line in a circumscribed quadrilateral. by Antonio Gutierrez from "Geometry Step by Step from the Land of the Incas"
O'Connor, John J.; Robertson, Edmund F., "Isaac Newton", MacTutor History of Mathematics Archive, University of St Andrews
Stanford Encyclopedia of Philosophy entry on Newton's views on space, time, and motion

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