physics

Vladimir Rojansky

Vladimir Rojansky 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 Vladimir Rojansky rather than just read about it. In short: Vladimir Borisovich Rojansky (April 9, 1900 – March 6, 1981) was an American physicist, author and educator. He was born in Bologoye, Russian Empire.

Key takeaways

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

Reference excerpt

Vladimir Borisovich Rojansky (April 9, 1900 – March 6, 1981) was an American physicist, author and educator. He was born in Bologoye, Russian Empire. His father was a railroad construction engineer and one of his grandfathers was a general. At the outbreak of the Russian Civil War (August 8, 1918) he enlisted in the dragoons of the White Army. Within a month he was wounded in action and was hospitalized until the end of January. During the war his regiment retreated across Siberia to the Far Eastern Republic. There he was discharged as an officer in April 1921. That year he crossed the Pacific to America. He graduated from Whitman College in 1924, from the University of Oregon (M.A. 1925), and from the University of Minnesota (Ph.D. 1928). His thesis was one of the first to employ the modern form of quantum mechanics. It was supervised by John van Vleck, who later won a Nobel Prize. In 1938 he published Introductory Quantum Mechanics, one of the earliest textbooks on the subject. He taught at Washington University in St. Louis (1928-1930), Union College (1930-1955), and Harvey Mudd College (1965-1972). From 1955 to 1965 he worked in the aerospace industry, first at the Ramo-Wooldridge Corporation and later at the Space Technology Laboratories of TRW.

Interest in contraterrene matter (antimatter) In a 1935 paper, Rojansky coined the terms "terrene" and "contraterrene" to describe, respectively, ordinary matter and the substance now commonly known as "antimatter," in which "atoms consist of negative nuclei surrounded by positrons." In a subsequent paper, he speculated that some comets may consist of antimatter. This suggestion was embraced by some meteorite specialists, and also found its way into science fiction stories.

Personal His marriage (1926-1958) to Betty Lantz produced a daughter. After his wife's death from Parkinson's disease he married (1958-1981) Mildred Black. His digestion never recovered from his war wounds.

Books Introductory Quantum Mechanics (1938) Electromagnetic Fields and Waves (1971)

References

Illustrations

Worked examples

Example 1 — a first encounter with Vladimir Rojansky

Start with the simplest possible case. Write down what Vladimir Rojansky 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 Vladimir Rojansky 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 Vladimir Rojansky 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 Vladimir Rojansky

In research: Vladimir Rojansky 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 Vladimir Rojansky 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: Vladimir Rojansky is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1900 births, 1981 deaths, 20th-century American physicists, so understanding it makes those chapters shorter.
In everyday life: Look for Vladimir Rojansky 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 Vladimir Rojansky in 20 minutes

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

Frequently asked questions

What is Vladimir Rojansky in simple terms?

Vladimir Borisovich Rojansky (April 9, 1900 – March 6, 1981) was an American physicist, author and educator. He was born in Bologoye, Russian Empire.

Why does Vladimir Rojansky 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 Vladimir Rojansky?

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 Vladimir Rojansky.