Faraday
Michael Faraday ( FAYR-uh-day; 22 September 1791 – 25 August 1867) was an English chemist and physicist who contributed vastly to the study of electrochemistry and electromagnetism. His main discoveries include the principles underlying electromagnetic induction, diamagnetism, and electrolysis. Although Faraday received little formal education, as a self-made man, he was one of the most influential scientists in history. It was by his research on the magnetic field around a conductor carrying a direct current that Faraday established the concept of the electromagnetic field in physics. Faraday also established that magnetism could affect rays of light and that there was an underlying relationship between the two phenomena. He similarly discovered the principles of electromagnetic induction, diamagnetism, and the laws of electrolysis. His inventions of electromagnetic rotary devices formed the foundation of electric motor technology, and it was largely due to his efforts that electricity became practical for use in technology. The SI unit of capacitance, the farad, is named after him.
As a chemist, Faraday discovered benzene and carbon tetrachloride, investigated the clathrate hydrate of chlorine, invented an early form of the Bunsen burner and the system of oxidation numbers, and popularised terminology such as "anode", "cathode", "electrode" and "ion". Faraday ultimately became the first and foremost Fullerian Professor of Chemistry at the Royal Institution, a lifetime position.
Faraday was an experimentalist who conveyed his ideas in clear and simple language, and thought and sensed the physical world in a visual manner, rather than in words or symbols. His mathematical abilities did not extend as far as trigonometry and were limited to the simplest algebra. Physicist and mathematician James Clerk Maxwell took the work of Faraday and others and summarised it in a set of equations which is accepted as the basis of all modern theories of electromagnetic phenomena. On Faraday's uses of lines of force, Maxwell wrote that they show Faraday "to have been in reality a mathematician of a very high order – one from whom the mathematicians of the future may derive valuable and fertile methods."
Faraday devoted considerable time and energy to public service. He worked on optimising lighthouses and protecting ships from corrosion. With Charles Lyell, he produced a forensic investigation on a colliery explosion at Haswell, County Durham, indicating for the first time that coal dust contributed to the severity of the explosion, and demonstrating how ventilation could have prevented it. Faraday also investigated industrial pollution at Swansea, air pollution at the Royal Mint, and wrote to The Times on the foul condition of the River Thames during the Great Stink. He refused to work on developing chemical weapons for use in the Crimean War, citing ethical reservations. He declined to have his lectures published, preferring people to recreate the experiments for themselves, to better experience the discovery, and told a publisher: "I have always loved science more than money and because my occupation is almost entirely personal I cannot afford to get rich."
Albert Einstein kept a portrait of Faraday on his study wall, alongside those of Isaac Newton and Maxwell. Physicist Ernest Rutherford stated, "When we consider the magnitude and extent of his discoveries and their influence on the progress of science and of industry, there is no honour too great to pay to the memory of Faraday, one of the greatest scientific discoverers of all time." He founded the Royal Institution's Friday Evening Discourses and was the main popularizer of its Christmas Lecture Series.
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