physics

Ihor Yukhnovskyi

Ihor Yukhnovskyi is a physics 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 Ihor Yukhnovskyi rather than just read about it. In short: Ihor Rafailovych Yukhnovskyi (Ukrainian: Iгор Рафаïлович Юхновський; also Yukhnovsky; 1 September 1925 – 26 March 2024) was a Ukrainian physicist and politician, and a member of the Presidium of Academy of Sciences of Ukraine, Hero of Ukraine. Life before politics Yukhnovskyi was born on 1 September 1925, in Kniahynyne village, Dubno powiat, Wołyń Voivodeship (Poland).

Key takeaways

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

Reference excerpt

Ihor Rafailovych Yukhnovskyi (Ukrainian: Iгор Рафаïлович Юхновський; also Yukhnovsky; 1 September 1925 – 26 March 2024) was a Ukrainian physicist and politician, and a member of the Presidium of Academy of Sciences of Ukraine, Hero of Ukraine.

Life before politics Yukhnovskyi was born on 1 September 1925, in Kniahynyne village, Dubno powiat, Wołyń Voivodeship (Poland). In 1944–1945 he participated in World War II on the side of Red Army. In 1951 he became the head of Theoretical Physics Department at Lviv University. In 1969 Yukhnovskyi, at that time Doctor of Physics and Mathematics led the newly organized Department of Statistical Theory of Condensed Matter. In 1980 the department was reorganized into the Lviv division of statistical physics for the Institute for Theoretical Physics, and then in 1990 into the Institute of Condensed Matter Physics of the National Academy of Sciences of Ukraine.

Political life On 30 March 1990, Yukhnovskyi was elected with 59.07% votes (out of 6 candidates) as a member of parliament of Ukrainian SSR from an election district in the city of Lviv. On 15 May 1990, he became the leader of the first ever opposition party in the Ukrainian SSR parliament named "Narodna Rada" (People’s Council). During the 24 August 1991 parliamentary debate preceding the Declaration of Independence of Ukraine Yukhnovskyi was the MP who first called on parliament to immediately declare Ukraine an independent democratic state. In the first presidential elections in Ukraine Yukhnovskyi was supported by 554,719 voters (1.74%) and took 5th place out of 6 candidates. In 1992 he was appointed the first vice Prime Minister of Ukraine. In the 1994 parliamentary elections Yukhnovskyi was elected to the parliament in the same electoral district as in 1990, the city of Lviv, with 60.41% of support. In the 1998 parliamentary elections he was elected as #15 in the People's Movement of Ukraine (Rukh) party list. In the 2002 parliamentary elections he was again elected as #68 now in the Our Ukraine party list. Yukhnovsky was an author of over 400 scientific papers, five books and a textbook "Osnovy kvantovoyi mekhaniky" (Fundamentals of Quantum Mechanics). As a member of the parliament he actively participated in passing of over 100 bills. He was one of the authors of the Act of Declaration of Independence of Ukraine. Ihor Yukhnovskyi was the head of All-Ukrainian Union of World War II veterans. He supported the reconciliation of veterans of the Soviet Army and the Ukrainian Insurgent Army. In 2006, the Ukrainian President Viktor Yushchenko appointed Ihor Yukhnovskyi director of the Ukrainian Institute of National Memory. Yukhnovskyi died on 26 March 2024, at the age of 98.

Distinctions Order of Liberty (Ukraine, 2016) Hero of Ukraine, 2005

References

External links Булгак, Павло (4 December 2006). Ігор Юхновський: "Леонід Кучма був мирним і гостинним чоловіком" [Igor Yukhnovsky: "Leonid Kuchma was peaceful and hospitable man"] (in Ukrainian). ХайВей. Archived from the original on 27 July 2011. Retrieved 15 February 2011. Translate this article from Ukrainian to English

Illustrations

Worked examples

Example 1 — a first encounter with Ihor Yukhnovskyi

Start with the simplest possible case. Write down what Ihor Yukhnovskyi claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, 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 Ihor Yukhnovskyi 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 Ihor Yukhnovskyi 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 Ihor Yukhnovskyi

In research: Ihor Yukhnovskyi appears in physics 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 Ihor Yukhnovskyi 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: Ihor Yukhnovskyi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1925 births, 2024 deaths, 20th-century Ukrainian physicists, so understanding it makes those chapters shorter.
In everyday life: Look for Ihor Yukhnovskyi 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 Ihor Yukhnovskyi in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ihor Yukhnovskyi means in your own words.
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Frequently asked questions

What is Ihor Yukhnovskyi in simple terms?

Why does Ihor Yukhnovskyi matter?

Because it connects several physics 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 Ihor Yukhnovskyi?

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 Ihor Yukhnovskyi.