John William Nicholson, a British mathematician and physicist born in 1881, pioneered an atomic model that quantized angular momentum as h/2π. His theoretical work on spectral line radiation influenced contemporary researchers, including Niels Bohr, who cited Nicholson’s contributions in his own 1913 atomic model paper. Nicholson’s academic career spanned prestigious institutions including the University of Cambridge and King’s College London.
Academic Foundation
Born in Darlington, Nicholson pursued his education at the University of Manchester, residing in Hulme Hall, where he earned both his B.Sc. and M.Sc. degrees. He later advanced to Trinity College, Cambridge, passing the Mathematical Tripos in 1904 as a Twelfth Wrangler. His early promise was recognized through several awards, including the Isaac Newton Studentship in 1906 and the Smith's Prize in 1907.
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In 1911, Nicholson proposed the existence of three elements—coronium, nebulium, and protofluorine—based on his analysis of nebular astronomical spectroscopy. While later observations by Ira Sprague Bowen correctly attributed these spectral lines to doubly ionized oxygen, Nicholson’s framework remained significant for attempting to explain radiation as electrons descended toward the atomic nucleus. His work on atomic structures and X-ray spectra marked an early attempt to integrate quantum concepts into subatomic models.
Professional Recognition
Nicholson’s contributions to mathematical physics earned him significant acclaim within the scientific community. He was awarded the Adams Prize twice, in 1913 and 1919. In 1917, he was elected a Fellow of the Royal Society. Throughout his tenure as a Professor of Mathematics at King’s College London, starting in 1912, he was known for providing students with deep, insightful lectures, even when he occasionally arrived late to his classroom duties.
Later Years and Confinement
In 1922, Nicholson married Dorothy Maud Wrinch, a graduate student he supervised at King’s College London. They had one daughter, Pamela, born in 1927. During the late 1920s, Nicholson’s mental health declined significantly. In 1930, he was certified as mentally ill and remained confined in the Warneford Hospital in Oxford until his death in 1955. His wife was granted a divorce in 1937 and later relocated to the United States with their daughter.
Fast facts
- Born: 1881, Darlington, United Kingdom
- Died: 1955, Oxford, United Kingdom
- Education: University of Manchester, University of Cambridge, Harris Manchester College
- Key Recognition: Fellow of the Royal Society, Adams Prize winner (1913, 1919)
- Professional Positions: Professor of Mathematics, King's College London
- Fields of Study: Mathematics, Physics, Mathematical Physics, Spectroscopy
- Marriage: Dorothy Maud Wrinch (1922–1937)
- Child: Pamela (born 1927)
Questions readers ask
What were Nicholson's most significant contributions to physics?
He developed an early atomic model that quantized angular momentum and theorized that spectral lines were caused by electrons moving toward the nucleus.
Why were his proposed elements like nebulium later disproven?
Ira Sprague Bowen later demonstrated that the observed spectral lines attributed to those elements were actually caused by doubly ionized oxygen.
Achievements
- Fellow of the Royal Society
- Adams Prize — 1913
- Fields: mathematics, physics and mathematical physics
