chemistry

Harry Friedmann

Harry Friedmann is a chemistry 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 Harry Friedmann rather than just read about it. In short: Harry Friedmann (Hebrew: הארי פרידמן; 28 November 1931 – 28 May 2018) was a professor of chemistry who specialized in theoretical nonlinear optics and lasers in biology. Biography Harry Friedmann (1931–2018) was born in Frankfurt am Main to Miriam (Manya) and Moshe Friedmann.

Key takeaways

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

Reference excerpt

Harry Friedmann (Hebrew: הארי פרידמן; 28 November 1931 – 28 May 2018) was a professor of chemistry who specialized in theoretical nonlinear optics and lasers in biology.

Biography Harry Friedmann (1931–2018) was born in Frankfurt am Main to Miriam (Manya) and Moshe Friedmann. Soon after his birth, the family fled to Czechoslovakia to the area that was called the Sudetenland and from there to Belgium. He studied at the Université libre de Bruxelles from 1951, gaining a Ph.D. with distinction in 1964 under the supervision of Nobel prize winner Ilya Prigogine. He was a research associate at the Weizmann Institute of Science (1962–1967), a senior lecturer at the Technion – Israel Institute of Technology (1967–1969) and then a professor at Bar-Ilan University in the Chemistry Department. He became a professor emeritus at Bar-Ilan University in 1999. Friedmann was married to Josephine and had two children, Jacqueline Perle and Daniel, and five grandchildren.

Scientific interests and publications His research focused on quantum statistical mechanics, spectroscopy of molecules in rare-gas crystals, theoretical nonlinear optics, especially isotope separation, nonlinear optical processes in atomic systems, light propagation and storage, and also the effect of laser light on biological systems. He published over 120 papers in peer-reviewed journals, many of them co-authored by colleagues Arlene Wilson-Gordon and Rachel Lubart.

References

Illustrations

Worked examples

Example 1 — a first encounter with Harry Friedmann

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

In research: Harry Friedmann appears in chemistry 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 Harry Friedmann 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: Harry Friedmann is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1931 births, 2018 deaths, Academic staff of Bar-Ilan University, so understanding it makes those chapters shorter.
In everyday life: Look for Harry Friedmann 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 Harry Friedmann in 20 minutes

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

Frequently asked questions

What is Harry Friedmann in simple terms?

Harry Friedmann (Hebrew: הארי פרידמן; 28 November 1931 – 28 May 2018) was a professor of chemistry who specialized in theoretical nonlinear optics and lasers in biology. Biography Harry Friedmann (1931–2018) was born in Frankfurt am Main to Miriam (Manya) and Moshe Friedmann.

Why does Harry Friedmann matter?

Because it connects several chemistry 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 Harry Friedmann?

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 Harry Friedmann.