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Yakov Alpert

Yakov Alpert 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 Yakov Alpert rather than just read about it. In short: Yakov Lvovich Alpert (Russian: Яков Львович Альперт; March 1, 1911 – October 5, 2010) was a Russian-born American physicist whose principal field of research was space plasma physics. Biography He was born in Ivnytsia, a village near Zhytomyr, in the Russian Empire.

Yakov Alpert — main illustration
Yakov Alpert — illustration

Key takeaways

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

Reference excerpt

Yakov Lvovich Alpert (Russian: Яков Львович Альперт; March 1, 1911 – October 5, 2010) was a Russian-born American physicist whose principal field of research was space plasma physics.

Biography He was born in Ivnytsia, a village near Zhytomyr, in the Russian Empire. In 1928 he obtained an excellent grade in the entrance examination for the Ukrainian Polytechnic Institute, but because his father, a commercial traveler, was considered not to be a worker, he was refused admission; instead, he took employment as a carpenter. In 1929 he left Zhitomir for Moscow, where he worked first as a builder's labourer, then as a draughtsman for architectural exhibitions. He was able to get a job as a technician at the Radio Institute of the Ministry of Communications in 1931, and from that time he remained in his chosen field of physics. During his scientific career in the USSR, Alpert worked from 1931 to 1934 at the Communications Radio Institute; then, from 1935 until 1951 at the Lebedev Physical Institute (FIAN) of the Academy of Sciences; and finally at the Institute of Terrestrial Magnetism, Propagation of Radio Waves, and Ionosphere (IZMIRAN) of the Academy of Sciences, from 1952 until he left the USSR in 1987. In 1973 he and his wife Svetlana Pivkova decided to emigrate. The first step was to obtain a letter from a relative in Israel, inviting them to settle there; at that time, even non-Jews leaving the Soviet Union could only go to Israel. He requested such a letter through Israel's Academy of Sciences, and in due course received one. Its arrival was noticed by the Soviet authorities, and as was then customary he was demoted at his place of work, in his case to a post of senior scientist with a reduced salary, while she was dismissed from her post (at a different Institute) and could not obtain one elsewhere. In 1975 they were finally permitted to apply for exit visas, but this application was refused, as were 26 other such applications they made during the next 12 years. During this period, he took an active part in a scientific seminar to maintain his skills and those of his fellow “refuseniks”. It was organized by Victor Brailovsky, and the other participants included Alexander Lerner, Yuri Orlov, and Anatoly Sharansky; though not himself a candidate for emigration, Andrei Sakharov often attended the seminar and supported the refuseniks until his exile to Gorky in 1980. Following the arrest of Brailovsky in 1981, these seminars were often held at the Alperts' apartment. In 1987, the Alperts received their visas and left for the US, where they arrived in 1988 and settled near Boston. For the rest of his professional life he was a Senior Staff Scientist at the Harvard-Smithsonian Center for Astrophysics. He never retired formally, but his last publication under the auspices of the Center for Astrophysics was made in 2001.

Scientific work Alpert's main scientific interests at the FIAN and the IZMIRAN were

Propagation of radio waves, particularly natural ones (i.e., "atmospherics") below and within the ionosphere. Physical structure of the ionosphere and the magnetosphere, and plasma wave processes in these regions. Interaction of moving bodies with a plasma. Between 1936 and 2001, he had 8 books published in Russian and 11 in English (9 original monographs, 3 second editions), the last one being his autobiography. Also he published about 200 scientific papers in Russian or in English and a dozen popular scientific papers in Russian. Forty-three of them are listed in Web of Science.

References

External links Y.L. Alpert, Tribute to the Scientific School of L.I. Mandelshtam. Lev Pitaevskii, Appreciation in Physics Reports 339, 2001. Obituary in American Geophysical Union, SPA Section Newsletter 17 (Issue 77), 2010 (text file will be automatically downloaded) Obituary in Physics-Uspekhi 54 (Issue 5), 2011 (in Russian). Translation to English.

Illustrations

Yakov Alpert illustration

Worked examples

Example 1 — a first encounter with Yakov Alpert

Start with the simplest possible case. Write down what Yakov Alpert 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 Yakov Alpert 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 Yakov Alpert 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 Yakov Alpert

In research
Yakov Alpert 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 Yakov Alpert 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
Yakov Alpert is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1911 births, 2010 deaths, 20th-century American physicists, so understanding it makes those chapters shorter.
In everyday life
Look for Yakov Alpert 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 Yakov Alpert in 20 minutes

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

Frequently asked questions

What is Yakov Alpert in simple terms?

Yakov Lvovich Alpert (Russian: Яков Львович Альперт; March 1, 1911 – October 5, 2010) was a Russian-born American physicist whose principal field of research was space plasma physics. Biography He was born in Ivnytsia, a village near Zhytomyr, in the Russian Empire.

Why does Yakov Alpert 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 Yakov Alpert?

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 Yakov Alpert.

Tags

  • 1911 births
  • 2010 deaths
  • 20th-century American physicists
  • American nuclear physicists
  • Jewish Russian physicists
  • Jewish Soviet physicists
  • People from Zhytomyr Oblast
  • Refuseniks
  • Russian nuclear physicists
  • Soviet emigrants to the United States
  • Soviet physicists
  • Ukrainian Jews

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