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astronomy

Qian Linzhao

Qian Linzhao is a astronomy 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 Qian Linzhao rather than just read about it. In short: Qian Linzhao (Chinese: 钱临照; Wade–Giles: Ch'ien Lin-chao; 28 August 1906 – 26 July 1999), also known as Tsien Ling-Chao, was a Chinese optical physicist and historian. He was a founding member of the Chinese Academy of Sciences, and served as Vice President of the University of Science and Technology of China.

Key takeaways

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

Reference excerpt

Qian Linzhao (Chinese: 钱临照; Wade–Giles: Ch'ien Lin-chao; 28 August 1906 – 26 July 1999), also known as Tsien Ling-Chao, was a Chinese optical physicist and historian. He was a founding member of the Chinese Academy of Sciences, and served as Vice President of the University of Science and Technology of China. He co-founded the Chinese Electron Microscopy Society, which established the Qian Linzhao Award in his memory.

Early life and education Qian was born in Wuxi, Jiangsu, China on 28 August 1906. His father, Qian Bogui (钱伯圭), was the teacher of the celebrated historian Qian Mu (Ch'ien Mu); his younger brother, Qian Lingxi (1916–2009), was also a distinguished scientist and a founding member of the Chinese Academy of Sciences. In 1929, Qian graduated from Utopia University in Shanghai with a bachelor's degree in physics, and became an assistant lecturer at the Northeastern University in Shenyang. In 1934, he was awarded a Boxer Indemnity Scholarship to study at the University of London, University College, where he spent three years conducting research on cubic crystal structures. After becoming disenchanted with the discrimination against foreign students in England, he left for Berlin, Germany in 1937.

Second Sino-Japanese War When the Second Sino-Japanese War broke out in July 1937, Qian returned to China to join the resistance. He helped the Institute of Physics of the Beiping Academy to evacuate Beiping (Beijing), which had come under Japanese attack, and to relocate to Kunming in southwestern China. He assisted Yan Jici, the director of the institute, with establishing an optical workshop in Kunming, where they developed and manufactured hundreds of high-powered microscopes and other instruments for hospitals and factories. He designed an instrument that measured tiny curvatures, which became widely used in Chinese factories. Qian was also interested in the history of physics. He studied the Mozi (Mohist Canon), and wrote a seminal paper on mechanics and optics in ancient China. When he met Joseph Needham in Kunming in 1943, he showed Needham his paper, which directly influenced the latter's interpretation of the Mozi and the treatment of physics in his Science and Civilisation in China.

People's Republic of China After the establishment of the People's Republic of China in 1949, Qian was elected a founding member of the Chinese Academy of Sciences in 1955. In 1958, he became a physics professor at the newly established the University of Science and Technology of China (USTC). He also co-founded the Chinese Electron Microscopy Society. In 1969–1970, during the Cultural Revolution, the USTC was relocated to Hefei, Anhui. Many of its professors and researchers refused to leave Beijing for the provincial city and quit the university, while Qian Linzhao and Qian Zhidao were the only two academicians who were willing to move. However, just eight days after he arrived in Hefei, he was denounced as a "capitalist reactionary academic authority". Already 64, he was sent to work at a coal mine in Huainan for five months to be "reeducated by the working class". After the end the Cultural Revolution, Qian was appointed Vice President of USTC at the age of 72. Concerned with the advanced age of most Chinese professors, he personally led the Special Class for the Gifted Young at USTC and taught the young students. He required all professors up to department chairs and school deans to give lectures, a rule that is still in force.

Death and legacy Qian died on 26 July 1999, at the age of 92. The Chinese Electron Microscopy Society established the Qian Linzhao Award in his memory to reward outstanding researchers in electron microscopy.

References

Worked examples

Example 1 — a first encounter with Qian Linzhao

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

In research
Qian Linzhao appears in astronomy 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 Qian Linzhao 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
Qian Linzhao is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1906 births, 1999 deaths, 20th-century Chinese science writers, so understanding it makes those chapters shorter.
In everyday life
Look for Qian Linzhao 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 Qian Linzhao in 20 minutes

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

Frequently asked questions

What is Qian Linzhao in simple terms?

Qian Linzhao (Chinese: 钱临照; Wade–Giles: Ch'ien Lin-chao; 28 August 1906 – 26 July 1999), also known as Tsien Ling-Chao, was a Chinese optical physicist and historian. He was a founding member of the Chinese Academy of Sciences, and served as Vice President of the University of Science and Technolog…

Why does Qian Linzhao matter?

Because it connects several astronomy 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 Qian Linzhao?

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 Qian Linzhao.

Tags

  • 1906 births
  • 1999 deaths
  • 20th-century Chinese science writers
  • Academic staff of the Northeastern University (China)
  • Academic staff of the University of Science and Technology of China
  • Alumni of University College London
  • Chinese expatriates in England
  • Chinese optical physicists
  • Educators from Wuxi
  • Historians from Jiangsu
  • Historians of science
  • Members of the Chinese Academy of Sciences

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