User talk:2409:4062:2E8B:7F65:1402:2CDC:6F3C:5479

About Robort Hooke biography======= Robert Hooke ,(born on July 18 {July 28,New style},Freshwater,Isle of Wight, England-- died March 3, 1703, London), English physicist who discovered the law of elasticity, known as Hooke's law, and who did reserch in a remarkable variety of fields. In 1655 Hooke discovered his law of elasticity, which states that the stretchingof a solid body (e.g.,metal, wood) is proportional to the force applied to it. The law laid the basis for studies of stress and strain and for understanding of elastic materials. He applied these studies in his designs for the balance springs of watches;his interest in timekeeping was further reflected in his effort to improve the pendulum for clock regulatiom. In 1662 he was appointed curator of expensive to the Royal Society of London and was elected a fellow the following year. One of the first men to build a Gregorianreflecting telescope, Hooke discovered the fifth star in the Trapezium, an asterism in the constellation Orion, in 1664 and the first suggested that Jupiter rotates on its axis. His detailed sketches of Mars were used in the 19th century to determine that planet's rate of rotation.In 1665 he was appointed professor og geometry in Gresham college. In Micrographia (1665;"Small Drawings")he included his studies and illustrations of the crystal structure of snowflakes, discussed the possibility of manufacturing artificial fibres by a process similar to the spinning of the silkworm, and the first used the word cell to name the microscopic honeycomb cavities in cork. His studiees of microscopic fossils led him to become one of the first proponents of s theory of evolution.He suggested that the force of gravity could be measured by utilizing the motion of a pendulum (1666) and attempted to show that Earth and Moon follow an elliptical path around the Sun.In 1672 he discovered the phenomenon of diffraction (the bending of light rays around corners); to explain it,he offered the wave theory of light. He started the inverse square law to describe plantary motions in 1678, a law that Newton later used in modified form. Hooke complained that he was not given sufficient credit for  the law and become involved in bitter controversy with Newton. Hooke was the first man to state in general that all matter expands when heated and that air is made up of particles separated from each other by relatively large distances.