astronomy

Sumit Ranjan Das

Sumit Ranjan Das 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 Sumit Ranjan Das rather than just read about it. In short: Sumit Ranjan Das (born 11 December 1955) is a US-based Indian high energy physicist and a professor at the University of Kentucky. Known for his research on string theory, Das is an elected fellow of the Indian Academy of Sciences.

Key takeaways

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

Reference excerpt

Sumit Ranjan Das (born 11 December 1955) is a US-based Indian high energy physicist and a professor at the University of Kentucky. Known for his research on string theory, Das is an elected fellow of the Indian Academy of Sciences. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, for his contributions to physical sciences in 1998.

Biography

Born on 11 December 1955 at Kolkata in the Indian state of West Bengal, Sumit Ranjan Das did his early schooling at South Point School and earned his graduate degree from Presidency College and master's degree from the Science College, University of Calcutta. Moving to the US, he enrolled at the University of Chicago for his doctoral studies and after securing a PhD in 1983, he did his post-doctoral studies at Fermilab (1983–85) and California Institute of Technology (1985–87). On his return to India in 1987, he joined Tata Institute of Fundamental Research where he served as a member of faculty till 2001. Subsequently, he went back to the US and joined the Department of Physics and Astronomy, University of Kentucky College of Arts and Sciences where he holds the position of Jack and Linda Gill Professor. He was a senior associate at Kavli Institute for the Physics and Mathematics of the Universe during 2009–10 and a visiting professor at Yukawa Institute for Theoretical Physics, Kyoto University during 2014 and has held visiting positions at several universities in the US.

Legacy The principal focus of Das' research is string theory and quantum field theory. His work on two dimensional strings is the earliest example of holographic principle. His work on black holes in string theory assisted in resolving the information paradox with regard to black holes.

Awards and honors Das was a gold medalist in both his graduate and master's examinations. The Council of Scientific and Industrial Research awarded him the Shanti Swarup Bhatnagar Prize, one of the highest Indian science awards in 1998. The Indian Academy of Sciences elected him as a fellow the same year.

Selected bibliography Sumit R. Das; Antal Jevicki (1990). "String Field Theory and Physical Interpretation of D=1 String". Modern Physics Letters A. 5 (28): 1639–1650. Bibcode:2005MPLA...20.2101D. doi:10.1142/S0217732390001888. Sumit R.Das; Samir D. Mathur (1996). "Comparing decay rates for black holes and D-branes". Nuclear Physics B. B478 (3): 561–576. arXiv:hep-th/9606185. Bibcode:1996NuPhB.478..561D. doi:10.1016/0550-3213(96)00453-1. S2CID 17202127. Sumit Das (2007). "Holography and cosmological singularities". International Journal of Modern Physics A. 22 (31): 5638–5655. arXiv:0706.4188. Bibcode:2007IJMPA..22.5638D. doi:10.1142/S0217751X0703889X. S2CID 11274511. Adel Awad; Sumit Das; K. Narayan; Sandip Trivedi (2008). "Gauge theory duals of cosmological backgrounds and their energy momentum tensors". Physical Review D. 77 (4) 046008. arXiv:0711.2994. Bibcode:2008PhRvD..77d6008A. doi:10.1103/PhysRevD.77.046008. S2CID 2458385. Sumit Das; Gautam Mandal (2009). "Microstate dependence of scattering from the D1-D5 system". Journal of High Energy Physics. 2009 (4): 036. arXiv:0812.1358. Bibcode:2009JHEP...04..036D. doi:10.1088/1126-6708/2009/04/036. S2CID 15928271.

Worked examples

Example 1 — a first encounter with Sumit Ranjan Das

Start with the simplest possible case. Write down what Sumit Ranjan Das 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 Sumit Ranjan Das 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 Sumit Ranjan Das 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 Sumit Ranjan Das

In research: Sumit Ranjan Das 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 Sumit Ranjan Das 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: Sumit Ranjan Das is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1955 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 Sumit Ranjan Das 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 “Sumit Ranjan Das” →

Affiliate

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

How to study Sumit Ranjan Das in 20 minutes

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

Frequently asked questions

What is Sumit Ranjan Das in simple terms?

Why does Sumit Ranjan Das 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 Sumit Ranjan Das?

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 Sumit Ranjan Das.