astronomy

Shasanka Mohan Roy

Shasanka Mohan Roy 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 Shasanka Mohan Roy rather than just read about it. In short: Shasanka Mohan Roy (born 2 September 1941) is an Indian quantum physicist and a Raja Ramanna fellow of the Department of Atomic Energy at the School of Physical Sciences of Jawaharlal Nehru University. He is also a former chair of the Theoretical Physics Group Committee at Tata Institute of Fundamental Research.

Key takeaways

Shasanka Mohan Roy belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
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Reproduce the core statement of Shasanka Mohan Roy from memory before moving on to harder problems.

Reference excerpt

Shasanka Mohan Roy (born 2 September 1941) is an Indian quantum physicist and a Raja Ramanna fellow of the Department of Atomic Energy at the School of Physical Sciences of Jawaharlal Nehru University. He is also a former chair of the Theoretical Physics Group Committee at Tata Institute of Fundamental Research. Known for developing Exact Integral Equation on pion-pion dynamics, also called Roy's equations, and his work on Bell inequalities, Roy is an elected fellow of all the three major Indian science academies – Indian Academy of Sciences, Indian National Science Academy, and National Academy of Sciences, India – as well as The World Academy of Sciences. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded Roy the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, for his contributions to Physical Sciences in 1981.

Biography Roy, born on 2 September 1941 in the Indian capital of Delhi, did his early college studies at Delhi University from where he earned a BSc (hons) in 1960 and an MSc in 1962. Subsequently, he moved to the US on a union territories overseas scholarship for his doctoral studies at Princeton University and after securing a PhD in 1966, he did his post-doctoral work at the University of California, San Diego from 1966 to 1967. On his return to India, Roy joined Tata Institute of Fundamental Research in 1967 to commence an association which would last close to four decades and during this period, he chaired the Theoretical Physics Group Committee of the institution from 1992 to 1997. He was serving as a senior professor at the time of his superannuation in 2006. Post retirement from regular service, Roy joined Jawaharlal Nehru University as a Raja Ramanna fellow of the Department of Atomic Energy at the School of Physical Sciences. He also held visiting faculty positions at a number of institutions abroad which included four stints at European Organization for Nuclear Research (CERN) and one each at Saclay Nuclear Research Centre, University of Lausanne, Syracuse University, University of Alberta, University of Kaiserslautern and University of York. Roy is married to Nandita and the couple has two children, Arunabha and Aditi. The family lives in Vashi, one of the nodes of Navi Mumbai in Maharashtra.

Legacy

Roy's research was principally based on pion dynamics and hadron interactions. His work on axiomatic quantum field theory assisted him to develop an exact integral equation which later came to be known as Roy's equations, and many scientists opined that the equation helped in pion–pion data analysis. Roy furthered the studies of Andre Martin on high-energy bounds and the observations of John Stewart Bell regarding Einstein-Podolsky-Rosen paradox; his work on the former resulted in the development of Roy-Singh bounds (unitarity bounds on high-energy cross sections) and the studies on the latter evolved into Roy-Singh multiparticle Bell inequalities and Auberson-Mahoux-Roy-Singh Bell inequalities. He developed the theme further by proposing Roy's multipartite separability inequalities. Another area of his research was the Chandrasekhar limit and the critical mass of boson systems, and Roy collaborated with Andre Martin to propose a proof for the relativistic collapse of Mcr critical mass. Dhar-Grover-Roy super-Zeno algorithm, for use in suppressing the transitions of a quantum mechanical system, Roy-Braunstein's quantum metrology, a precision measurement protocol, and his elucidation of Pomeranchuk's theorem and its violations are some of his other major contributions. His studies have been documented by way of a number of articles and ResearchGate, an online repository of scientific articles, has listed 105 of them. Besides, he has published a book, Advances in High Energy Physics, along with Virendra Singh, and his work has drawn citations from other scientists. Roy initiated the Theoretical Physics Seminar Circuit (TPSC) of the Department of Science and Technology (DST) at Tata Institute of Fundamental Research. He has conducted lecture courses for DST at CSIR-Structural Engineering Research Centre institutions and served as the expert member at the senate of the Indian Institute of Technology, Bombay in 1997. Roy was the principal Indian investigator of the Indo-French Centre for the Promotion of Advanced Research (IFCPAR/CEFIPRA)-funded project on Rigorous Results on Schroedinger Equations and Foundations of Quantum Theory and Applications to Particle physics and Astrophysics during 1999–2002.

Awards and honors The Council of Scientific and Industrial Research awarded Roy the Shanti Swarup Bhatnagar Prize, one of the highest Indian science awards in 1981' The Indian Academy of Sciences elected him as a fellow in 1982 and he became of fellow of the Indian National Science Academy in 1989. The other major Indian science academy, National Academy of Sciences, India made him their fellow in 1993 and The World Academy of Sciences elected Roy as a fellow in 2002. In 2003, Indian Science Congress Association selected him for the S. N. Bose Birth Centenary Gold Medal.

Selected bibliography

Books S. M. Roy; Virendra Singh (1973). Advances in High Energy Physics. Tata Institute of Fundamental Research.

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Shasanka Mohan Roy

Start with the simplest possible case. Write down what Shasanka Mohan Roy 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 Shasanka Mohan Roy 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 Shasanka Mohan Roy 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 Shasanka Mohan Roy

In research: Shasanka Mohan Roy 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 Shasanka Mohan Roy 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: Shasanka Mohan Roy is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1941 births, 20th-century Indian physicists, Academic staff of Tata Institute of Fundamental Research, so understanding it makes those chapters shorter.
In everyday life: Look for Shasanka Mohan Roy 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 Shasanka Mohan Roy in 20 minutes

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Close the page and write down what Shasanka Mohan Roy means in your own words.
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Frequently asked questions

What is Shasanka Mohan Roy in simple terms?

Why does Shasanka Mohan Roy 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 Shasanka Mohan Roy?

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 Shasanka Mohan Roy.