English mathematician, astronomer, theologian, author and physicist (described in his own day as a "natural philosopher") who is widely
recognized as one of the most influential scientists of all time, and a key
figure in the scientific revolution. His book Philosophiæ Naturalis Principia
Mathematica ("Mathematical Principles of Natural
Philosophy"), first published in 1687, laid the foundations of classical mechanics. Newton also made path
breaking contributions to optics, and he shares credit with Gottfried Wilhelm
Leibniz for
developing the infinitesimal calculus.
Newton's Principia formulated
the laws of motion and
universal gravitation that dominated
scientists' view of the physical universe for the next three centuries. By
deriving Kepler's laws of
planetary motion from his mathematical description of gravity, and using the same principles to account for the trajectories of comets, the tides, the precession of the equinoxes, and other phenomena,
Newton removed the last
doubts about the validity of the heliocentric model of the Solar System and demonstrated that the motion of objects on Earth and of celestial bodies could be
accounted for by the same principles. Newton's theoretical prediction that the
Earth is shaped as an oblate spheroid was later vindicated by the geodetic measurements of Maupertuis, La Condamine, and others, thus
convincing most Continental European
scientists of the
superiority of Newtonian mechanics over the earlier
system of Descartes.
Newton also built the
first practical reflecting telescope and developed a
sophisticated theory of colour based on the observation that a prism decomposes white light into the colors of
the visible spectrum. Newton's work on light
was collected in his highly influential book Opticks,
first published in 1704. He also formulated an empirical law of
cooling,
made the first theoretical calculation of the speed of sound, and introduced the notion of a Newtonian fluid. In addition to his work on calculus, as a mathematician Newton
contributed to the study of power series, generalized the binomial theorem to non-integer exponents, developed a method for approximating the roots of a function, and classified most of
the cubic plane curves.
Comments
Newtonian
Physics was followed until Einstein arrived on the scene and published his
Special Theory of Relativity in 1905 and his General Theory of Relativity in
1915.
Norb
Leahy, Dunwoody GA Tea Party Leader
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