Samuel Earnshaw
Encyclopedia
Samuel Earnshaw was an English clergyman and mathematician, noted for his contributions to theoretical physics, especially "Earnshaw's Theorem
".
Earnshaw was born in Sheffield
and entered St John's College, Cambridge
, graduating Senior Wrangler and Smith's Prize
man in 1831.
From 1831 to 1847 Earnshaw worked in Cambridge as tripos coach, and in 1846 was appointed to the parish church St. Michael, Cambridge. For a time he acted as curate to the Revd Charles Simeon
. In 1847 his health broke down and he returned to Sheffield working as a chaplain and teacher.
Earnshaw published several mathematical and physical articles and books. His most famous contribution, "Earnshaw's Theorem
", shows the impossibility of stable levitating permanent magnets: other topics included optics, waves, dynamics and acoustics in physics, calculus, trigonometry and partial differential equations in mathematics. As a clergyman, he published several sermons and treatises.
Earnshaw's theorem
Earnshaw's theorem states that a collection of point charges cannot be maintained in a stable stationary equilibrium configuration solely by the electrostatic interaction of the charges. This was first proven by British mathematician Samuel Earnshaw in 1842. It is usually referenced to magnetic...
".
Earnshaw was born in Sheffield
Sheffield
Sheffield is a city and metropolitan borough of South Yorkshire, England. Its name derives from the River Sheaf, which runs through the city. Historically a part of the West Riding of Yorkshire, and with some of its southern suburbs annexed from Derbyshire, the city has grown from its largely...
and entered St John's College, Cambridge
St John's College, Cambridge
St John's College is a constituent college of the University of Cambridge. The college's alumni include nine Nobel Prize winners, six Prime Ministers, three archbishops, at least two princes, and three Saints....
, graduating Senior Wrangler and Smith's Prize
Smith's Prize
The Smith's Prize was the name of each of two prizes awarded annually to two research students in theoretical Physics, mathematics and applied mathematics at the University of Cambridge, Cambridge, England.- History :...
man in 1831.
From 1831 to 1847 Earnshaw worked in Cambridge as tripos coach, and in 1846 was appointed to the parish church St. Michael, Cambridge. For a time he acted as curate to the Revd Charles Simeon
Charles Simeon
Charles Simeon , was an English evangelical clergyman.He was born at Reading, Berkshire and educated at Eton College and King's College, Cambridge. In 1782 he became fellow of King's College, and took orders, receiving the living of Holy Trinity Church, Cambridge, in the following year...
. In 1847 his health broke down and he returned to Sheffield working as a chaplain and teacher.
Earnshaw published several mathematical and physical articles and books. His most famous contribution, "Earnshaw's Theorem
Earnshaw's theorem
Earnshaw's theorem states that a collection of point charges cannot be maintained in a stable stationary equilibrium configuration solely by the electrostatic interaction of the charges. This was first proven by British mathematician Samuel Earnshaw in 1842. It is usually referenced to magnetic...
", shows the impossibility of stable levitating permanent magnets: other topics included optics, waves, dynamics and acoustics in physics, calculus, trigonometry and partial differential equations in mathematics. As a clergyman, he published several sermons and treatises.