Thursday, May 21, 2009

Sir Isaac Newton and Three Law Of Motion
-Resume of Newton’s life and my point of view about the three law of motion

Jermaine R. Williams Fargas

Sir Isaac Newton, born  in 4 January 1643 and died in  31 March 1727 [OS: 25 December 1642 – 20 March 1727]) was an English physicist, mathematician, astronomer, natural philosopher, alchemist, and theologian. For me he was one of the most influential men in human history and his invents and discoveries will be remembered forever. Sir Isaac is the author of one of one of the most influential book in the history, history of science. This book was published in 1687 and contents the basic concepts of universal gravitation and the three law of motion.This three law of motion describe totality any possible motion of anything. Newton’s laws of motion are studied for many peoples in many fields for example physic. This three law are Inertia law, the relation between force and chance in momentum and action and reaction law. Newton's First Law (also known as the Law of Inertia) states that an object at rest tends to stay at rest and that an object in uniform motion tends to stay in uniform motion unless acted upon by a net external force. Newton's Second Law states that an applied force, on an object equals the rate of change of its momentum, with time. Newton's Third Law states that for every action there is an equal and opposite reaction. This means that any force exerted onto an object has a counterpart force that is exerted in the opposite direction back onto the first object. For me is so interesting to learn more about this law because knowing it I can understand better many thing in my life.
 
Based in the history, Newton was a very controversial person. That is because he was a person decided in his beliefs and opinions. From 1670 to 1672, Newton lectured on optics. During this period he investigated the refraction of light, demonstrating that a prism could decompose white light into a spectrum of colors, and that a lens and a second prism could recompose the multicolored spectrum into white light. He also invented a reflecting telescope that he presented to the Royal Society in 1672. This telescope was created to check his concept about refraction of light.
Sir Isaac Newton was an exceptional human being that helps to improve the knowledge in many areas science, physic, astronomy etc. His discoveries are studied and analyze even today, 2009. For many scientific his most important discovery was the three law of motion. This three law was the base of many fields like physic and dynamic. For nobody was a surprise that Sir Isaac Newton was, being and will be an important person in the history and his legacy will remain forever. 

Saturday, May 16, 2009

James Clerk Maxwell 

Jose Antonio Alvarez Rivera

      James Clerk Maxwell was a scottish mathematician and physicist who published physical and mathematical theories of the electromagnetic field. He was born in 13 June 1831 and died in 5 November 1879. His best achievement was the development of the classical electromagnetic theory synthesizing all previous unrelated observations, experiments and equations of electricity and magnetism. His mother help him since he was a little boy and took responsibility of his education. He was really fascinated by geometry and most of his great talent went unnoticed. For his first scientific work he wrote a paper describing a mechanical means of drawing mathematical curves with a piece of twine and the properties of elloipses and curves with more than two foci. He presented his work with the help of his professor James forbes of natural philosophy at the royal society of Edinburgh. When he was eighteenth years old he contributed two papers for the transactions of the royal society of Edinburgh. One was the Equilibrium of Elastic Solids and the other was of the rolling curves.  
Maxwell graduated from trinity in 1854 with a degree in mathematics. He manage to score second highest in the final examination behind Edward Routh and then he earn himself the title of second wrangler.  

The nature and perception of colour was one of his greatest interests and he began at Edinburgh University while he was a student of Forbes. He took the coloured spinning tops invented by Forbes and was able to demostrade that white light would result from a mixture of red, green and blue light. His paper of experiment on colour laid out the principles of colour combination and he presented it at the royal society of Edinburgh in March 1855. Immediately he was made a fellow of trinity on 10 October of 1855 and was asked to prepare lectures on hydrostatics and optics and to set examination papers. Then he was awarded the Royal Society’s Rumford medal in 1860 for his work on colour and elected to the society itself in 1861. He resigned the chair at king’s college London and returned to Glendair  in  1865. Then he wrote a textbook of the theory of heat in 1871 and an elementary treatise on matter and motion in 1876. And also he was the first to make explicit use of dimensional analysis in 1871.  
Maxwell became the first Cavendish professor of physics at Cambridge in 1871 and was put in charge of the development of the Cavendish laboratory. Maxwell is considered one of the greatest scientific in our time, too bad he died young. He’s work in electromagtetism has been called “the second great unification in physics” after the first one carried out by Isaac Newton. He demonstrated that electric and magnetic fields travel through space in the form of waves and at the constant speed of light. Einstein describe he’s work as “the most profound and the most fruitful that physics has experienced since the time of Newton. Einstein kept a photograph of him on his study wall with pictures of Michael Faraday and Newton. He died in Cambridge of abdominal cancer on 5 November 1879 at the age of 48.