physics

Isidor Fankuchen

Isidor Fankuchen 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 Isidor Fankuchen rather than just read about it. In short: Isidor Fankuchen (July 19, 1905 – June 28, 1964) was an American pioneer of crystallography. Known to his friends as "Fan" he was from a Jewish family of Dutch origin and trained in Cornell and under W.L.

Key takeaways

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

Reference excerpt

Isidor Fankuchen (July 19, 1905 – June 28, 1964) was an American pioneer of crystallography. Known to his friends as "Fan" he was from a Jewish family of Dutch origin and trained in Cornell and under W.L. Bragg and J.D. Bernal. He was one of the founders of the International Union of Crystallography (1945). His name has mistakenly been recorded also as Isadore van Kueken. Fankuchen was born in Brooklyn in a family of modest means and went to Cooper Union where he received a BS in 1926. He then studied at Cornell with a Hecksher fellowship and received a PhD in 1933 after working under C.C. Murdock. He then went to Manchester University on a post-doctoral fellowship from the Schweinburg Foundation and worked with Sir Lawrence Bragg (1933–34) followed by two years at Birkbeck College with J.D. Bernal during which time they examined the structure of chymotrypsin and haemoglobin. He also collaborated with Bernal's student Dorothy Hodgkin (then Dorothy Crowfoot) in studying steroids. He then returned to the United States and worked on protein chemistry at the Massachusetts Institute of Technology. He then joined the Anderson Institute for Biological Research, Red Wing, Minnesota serving as an assistant director (1941–42). In 1941 he was elected a Fellow of the American Physical Society. From 1942 until his death in 1964 he was a faculty member at the Polytechnic Institute of Brooklyn. He was influential in training a generation of crystallographers and organized a monthly seminar group called the "Point Group". His courses produced so-called "Fan's two-week wonders" who learned crystallography and knew what could be done with it. Fankuchen studied the structure of the tobacco mosaic virus (along with F. C. Bawden), the tomato bushy stunt virus, and fibres. His greatest influence was as a teacher. He edited the journal Acta Crystallographica from 1948. He died of cancer in Brooklyn.

References

External links

Archival collections Isidor Fankuchen papers, 1933-1964, Niels Bohr Library & Archives Isidor Fankuchen papers, New York University Libraries Portrait photos of Fankuchen in the Poly Archives at the Bern Dibner Library of Science and Technology, NYU Libraries

Illustrations

Worked examples

Example 1 — a first encounter with Isidor Fankuchen

Start with the simplest possible case. Write down what Isidor Fankuchen 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 Isidor Fankuchen 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 Isidor Fankuchen 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 Isidor Fankuchen

In research: Isidor Fankuchen 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 Isidor Fankuchen 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: Isidor Fankuchen is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1905 births, 1964 deaths, 20th-century American physicists, so understanding it makes those chapters shorter.
In everyday life: Look for Isidor Fankuchen 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Isidor Fankuchen” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Isidor Fankuchen in 20 minutes

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

Frequently asked questions

What is Isidor Fankuchen in simple terms?

Why does Isidor Fankuchen 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 Isidor Fankuchen?

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 Isidor Fankuchen.