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astronomy

James P. C. Southall

James P. C. Southall is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand James P. C. Southall rather than just read about it. In short: James P. C.

James P. C. Southall — main illustration
James P. C. Southall — illustration

Key takeaways

  • James P. C. Southall belongs to astronomy; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect James P. C. Southall to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of James P. C. Southall from memory before moving on to harder problems.

Reference excerpt

James P. C. Southall (1871-1962) was an American physicist, professor at Columbia University (1914 to 1940), and specialist in optics. He was president of the Optical Society of America (1921) and translator of Physiological Optics by Helmholtz. James Southall was born in Norfolk, Va., on April 4, 1871. He attended Richmond College from 1886 to 1888 and obtained an A.B. in 1891 and an M.A. in 1893 at the University of Virginia. He was an instructor in physics at the University of Virginia between 1891 and 1893, and he taught physics and mathematics at the Miller Manual Training School, in Albemarle, Va. He had a fellowship at Johns Hopkins from 1898 to 1899 and taught at Hobart College, Geneva, N.Y., from 1899 to 1901. From 1901 to 1914, he taught at Alabama Polytechnic Institute, and in 1914 he joined the faculty at Columbia University, where he served until his retirement in 1940. His two specialties were geometrical optics and physiological optics. He wrote Principles of Geometrical Optics in 1910 and Mirrors, Prisms and Lenses (1918, rev. eds. 1923, 1934). But he is probably best known as editor of the American edition of Helmholtz's Physiological Optics (1924–25). He also wrote Introduction to Physiological Optics (1941). He wrote many papers, a number of which appeared in JOSA, on optical illusions and geometrical optics. He served as president of the Optical Society of America in 1921. During the First World War, he was a consultant to the War Department on range finders, periscopes, gunsights and similar optical equipment. Fifteen of his articles were published in JOSA on such topics as ray tracing, conjugate surfaces and the early pioneers in physiological optics. In retirement, he returned to Charlottesville and the University of Virginia, and donated most of his books and papers to the library there. He was buried at the University of Virginia cemetery.

See also Optical Society of America#Past Presidents of the OSA

References

External links Works by or about James P. C. Southall at the Internet Archive Articles Published by early OSA Presidents Archived 2015-03-20 at the Wayback Machine Journal of the Optical Society of America

Illustrations

James P. C. Southall: Southall's gravestone at the University of Virginia Cemetery in Charlottesville, Virginia.
Southall's gravestone at the University of Virginia Cemetery in Charlottesville, Virginia.

Worked examples

Example 1 — a first encounter with James P. C. Southall

Start with the simplest possible case. Write down what James P. C. Southall claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to James P. C. Southall before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about James P. C. Southall ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of James P. C. Southall

In research
James P. C. Southall appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses James P. C. Southall in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
James P. C. Southall is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1871 births, 1962 deaths, American optical physicists, so understanding it makes those chapters shorter.
In everyday life
Look for James P. C. Southall outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study James P. C. Southall in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what James P. C. Southall means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain James P. C. Southall out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is James P. C. Southall in simple terms?

James P. C.

Why does James P. C. Southall matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study James P. C. Southall?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on James P. C. Southall.

Tags

  • 1871 births
  • 1962 deaths
  • American optical physicists
  • American physicist stubs
  • Auburn University faculty
  • Burials at the University of Virginia Cemetery
  • Columbia University faculty
  • Johns Hopkins University fellows
  • Presidents of Optica (society)
  • University of Virginia alumni

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