André-Marie Ampère
Who was André-Marie Ampère?
French physicist and mathematician who founded the science of electrodynamics and for whom the unit of electric current, the ampere, is named.
Biographical data adapted from Wikipedia’s article on André-Marie Ampère (CC BY-SA 4.0).
Biography
André-Marie Ampère (1775-1836) was a French physicist, mathematician, and philosopher who laid the groundwork for classical electromagnetism and contributed significantly to chemistry and mathematics. Born in Lyon on January 20, 1775, Ampère showed remarkable intelligence from a young age, teaching himself by reading encyclopedias and scientific texts. The execution of his father during the French Revolution in 1793 deeply affected him and caused a period of depression that temporarily interrupted his studies.
Ampère's scientific journey took off when he moved to Paris and joined the École polytechnique, first as a student and later as a professor. Initially focusing on partial differential equations, he helped develop what's known as the Monge-Ampère equation. His most significant work came in electromagnetism after Hans Christian Oersted discovered in 1820 that electric currents create magnetic effects. Within weeks of hearing about Oersted's discovery, Ampère began his own experiments and developed a theoretical framework.
Ampère's detailed study of electromagnetic phenomena led to his formulation of Ampère's circuital law and Ampère's force law, key principles that describe how electric currents and magnetic fields interact. He showed that parallel conductors carrying currents in the same direction pull towards each other, while those carrying currents in opposite directions push apart. His mathematical approach to these phenomena was so detailed that James Clerk Maxwell later referred to him as the 'Newton of electricity.' Ampère coined the term 'electrodynamics' for this new science and invented the solenoid, seeing its value in creating controlled magnetic fields.
In addition to his work in electromagnetism, Ampère made notable contributions to chemistry. He suggested that elements could be grouped by their properties and supported Avogadro's hypothesis about gases. In mathematics, he worked on partial differential equations and probability theory. His philosophical interests also led him to develop a system for classifying human knowledge. Ampère married Julie Carron in 1799, but they faced personal challenges in their marriage. During his lifetime, he earned various honors, including being made a Knight of the Legion of Honour in 1814 and a Foreign Member of the Royal Society in 1827. He died in Marseille on June 10, 1836, while on a tour inspecting French universities.
Before Fame
Ampère's early education was unique because his father preferred allowing him to follow his own interests rather than sticking to strict courses. By the time he was 12, he had read all 20 volumes of Diderot's Encyclopédie and learned Latin so he could read mathematical works by Euler and Bernoulli. After his father was tragically executed during the Reign of Terror in 1793, Ampère couldn't focus on his studies for almost two years.
He slowly got back on track after marrying Julie Carron in 1799 and started teaching mathematics at various schools around Lyon. His mathematical skills got noticed due to his work on probability theory and the analysis of gambling, which earned him a spot at the École centrale in Bourg-en-Bresse in 1801. This job marked the start of his official academic career and eventually led him to Paris.
Key Achievements
- Formulated Ampère's circuital law and Ampère's force law, fundamental principles of electromagnetism
- Founded the science of electrodynamics and provided mathematical framework for electromagnetic phenomena
- Invented the solenoid and coined the term, revolutionizing the generation of controlled magnetic fields
- Contributed to the Monge-Ampère equation in mathematics and advanced partial differential equation theory
- Published 'Memoir on the Mathematical Theory of Electrodynamic Phenomena, Uniquely Deduced from Experience'
Did You Know?
- 01.Ampère could perform complex mathematical calculations in his head and once solved a difficult problem by visualizing equations written on a blackboard that turned out to be the back of a moving carriage
- 02.He coined the word 'kinematics' from Greek terms meaning motion, creating the term 'cinématique' which became the foundation for the English word
- 03.Ampère's name appears on the Eiffel Tower as one of 72 distinguished French scientists honored by Gustave Eiffel
- 04.He developed his fundamental electromagnetic theories within just one week of learning about Oersted's discovery, presenting his first paper to the French Academy of Sciences seven days later
- 05.The electrical telegraph was among his practical inventions, though it received less attention than his theoretical work in electromagnetism
Family & Personal Life
Awards & Honors
| Award | Year | Details |
|---|---|---|
| Knight of the Legion of Honour | 1814 | — |
| Foreign Member of the Royal Society | 1827 | — |
| 72 names on the Eiffel Tower | — | — |