astronomy

Uuno Öpik

Uuno Öpik 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 Uuno Öpik rather than just read about it. In short: Uuno Öpik (a.k.a. Uno Öpik; 19 October 1926 in Tartu, Estonia – 30 April 2005 in Bath, UK) was an Estonian-born atomic physicist most of whose adult life was spent in Northern Ireland and Great Britain.

Key takeaways

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

Reference excerpt

Uuno Öpik (a.k.a. Uno Öpik; 19 October 1926 in Tartu, Estonia – 30 April 2005 in Bath, UK) was an Estonian-born atomic physicist most of whose adult life was spent in Northern Ireland and Great Britain.

Pseudo Jahn–Teller effect In the 1957 paper "Studies of the Jahn-Teller effect. I. A survey of the static problem", the authors (Uuno Öpik & Maurice Henry Lecorney Pryce) formulated the Pseudo Jahn–Teller effect (PJTE) problem for the first time, and demonstrated that this mechanism is a source of instability in polyatomic systems (molecules and solids). This is discussed in [Bersuker], which credits [Opik & Pryce] as an early treatment of vibronic instability in molecular and solid-state systems.

Life and career Uuno Öpik graduated from Tartu 1st Gymnasium in 1943. In 1943 his father Ernst moved the family to Danzig, and then to Swinemünde and finally to Hamburg. From 1946 to 1948 he studied at the Baltic University. In 1948 the family moved to Northern Ireland, when his father joined the staff at the Armagh Observatory. In 1950 he became a member of Student Society Liivika. Öpik studied at Queen's University Belfast (QUB), getting a BSc in mathematics in 1950, a BSc in physics in 1951, and a PhD in physics in 1954 with the thesis, "Quantal investigations of certain excitation and ionization processes" under the advisor David Bates. He worked as a research fellow at the University of Bristol from 1955 to 1956, as a lecturer at the University of Aberystwyth in Wales from 1956 to 1986 and at the University of Reading from 1960 to 1962. In 1962, he returned to QUB, where he served on the staff until retirement in 1986. His doctoral students included Raymond Flannery and Hugh Morrison. He was one of six children of Estonian astronomer and astrophysicist Ernst Öpik. His son is the British politician Lembit Öpik.

Papers Öpik, Uuno; Pryce, Maurice Henry Lecorney (29 January 1957). "Studies of the Jahn-Teller effect. I. A survey of the static problem". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 238 (1215): 425–447. doi:10.1098/rspa.1957.0010. Öpik, Uuno (1967). "The polarisation of a closed-shell core of an atomic system by an outer electron I. A correction to the adiabatic approximation". Proceedings of the Physical Society. 92 (3): 566–572. doi:10.1088/0370-1328/92/3/305.

References

External links Uuno Öpik at the Mathematics Genealogy Project

Worked examples

Example 1 — a first encounter with Uuno Öpik

Start with the simplest possible case. Write down what Uuno Öpik 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 Uuno Öpik 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 Uuno Öpik 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 Uuno Öpik

In research: Uuno Öpik 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 Uuno Öpik 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: Uuno Öpik is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1926 births, 2005 deaths, Academics of Aberystwyth University, so understanding it makes those chapters shorter.
In everyday life: Look for Uuno Öpik 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 Uuno Öpik in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Uuno Öpik 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 Uuno Öpik out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Uuno Öpik in simple terms?

Why does Uuno Öpik 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 Uuno Öpik?

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 Uuno Öpik.