astronomy

Max Krook

Max Krook 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 Max Krook rather than just read about it. In short: Max Krook (1913 – 4 August 1985) was an American mathematician and astrophysicist. Krook was born in Standerton, South Africa, the son of Pesach Israel Krook and Leah Krook.

Key takeaways

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

Reference excerpt

Max Krook (1913 – 4 August 1985) was an American mathematician and astrophysicist. Krook was born in Standerton, South Africa, the son of Pesach Israel Krook and Leah Krook. An undergraduate at the University of the Witwatersrand, Krook received a doctorate in mathematics from Cambridge University in England in 1938 under the supervision of Arthur Eddington. He was subsequently recruited to Birmingham University by Rudolf Peierls. Krook came to the United States in 1950 as a research associate in physics at the Indiana University, soon moving to the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts. He was additionally appointed a research fellow at the Harvard College Observatory in 1952. In 1956, he became a lecturer in astronomy, and, in 1959, a professor in the Harvard's Division of Applied Sciences and the department of astronomy. Robert May (later, Baron May of Oxford) was one of his first postdoctoral students. Krook was for decades a regular at Cambridge's Legal Sea Foods restaurant, where a particular table was often held for him at lunchtime. Krook married Gulielma Penn-Gaskel White, 1952 graduate of Radcliffe College, and later successful photographer, in 1956. Although ultimately divorced, they continued to share a residence in Arlington, Massachusetts until the time of his death. Krook is remembered for his contribution to the Bhatnagar-Gross-Krook model.

Selected works Functions of a Complex Variable: Theory and Technique, by George F. Carrier, Max Krook, and Carl E. Pearson, SIAM, 2005, ISBN 0-89871-595-4 (first edition: McGraw-Hill, 1966, ISBN 0-07-010089-6). Bhatnagar, P. L.; Gross, E. P.; Krook, M. (1954-05-01). "A Model for Collision Processes in Gases. I. Small Amplitude Processes in Charged and Neutral One-Component Systems". Physical Review. 94 (3). American Physical Society (APS): 511–525. Bibcode:1954PhRv...94..511B. doi:10.1103/physrev.94.511. ISSN 0031-899X.

References

Illustrations

Worked examples

Example 1 — a first encounter with Max Krook

Start with the simplest possible case. Write down what Max Krook 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 Max Krook 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 Max Krook 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 Max Krook

In research: Max Krook 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 Max Krook 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: Max Krook is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1913 births, 1985 deaths, 20th-century American physicists, so understanding it makes those chapters shorter.
In everyday life: Look for Max Krook 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 Max Krook in 20 minutes

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

Frequently asked questions

What is Max Krook in simple terms?

Max Krook (1913 – 4 August 1985) was an American mathematician and astrophysicist. Krook was born in Standerton, South Africa, the son of Pesach Israel Krook and Leah Krook.

Why does Max Krook 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 Max Krook?

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 Max Krook.