08 Jan, 2016
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Worksheets on Current Topics for Banking English Test Papers.
Nirdeshak is developing tailor made comprehension section from the recent news articles published in leading newpapers across the world. It is important to recognizing letters and words in the passage, as it is the first step in learning to read. For students it is vital that students comprehend, or understand, what they are reading. They must be able to get the meaning of the text: What is the author telling the reader?
Topic: Quantum Physics
A mathematical problem underlying fundamental questions in particle and quantum physics is provably unsolvable, according to scientists at UCL, Universidad Complutense de Madrid – ICMAT and Technical University of Munich.
It is the first major problem in physics for which such a fundamental limitation could be proven. The findings are important because they show that even a perfect and complete description of the microscopic properties of a material is not enough to predict its macroscopic behaviour.
A small spectral gap – the energy needed to transfer an electron from a low-energy state to an excited state – is the central property of semiconductors. In a similar way, the spectral gap plays an important role for many other materials. When this energy becomes very small, i.e. the spectral gap closes, it becomes possible for the material to transition to a completely different state. An example of this is when a material becomes superconducting.
Mathematically extrapolating from a microscopic description of a material to the bulk solid is considered one of the key tools in the search for materials exhibiting superconductivity at ambient temperatures or other desirable properties. A study, published today in Nature, however, shows crucial limits to this approach. Using sophisticated mathematics, the authors proved that, even with a complete microscopic description of a quantum material, determining whether it has a spectral gap is, in fact, an undecidable question.
“Alan Turing is famous for his role in cracking the Enigma code,” said co-author, Dr Toby Cubitt from UCL Computer Science. “But amongst mathematicians and computer scientists, he is even more famous for proving that certain mathematical questions are `undecidable’ – they are neither true nor false, but are beyond the reach of mathematics. What we’ve shown is that the spectral gap is one of these undecidable problems. This means a general method to determine whether matter described by quantum mechanics has a spectral gap, or not, cannot exist. Which limits the extent to which we can predict the behaviour of quantum materials, and potentially even fundamental particle physics.
End of Passage –
a) Invisible to naked eye
b) Related to microbes
c) Related to atoms
d) Visible to naked eye
a) Transporting by vehicle
b) Change from one state to another
c) Move to another place
d) Transfer money
c) To estimate
d) To extradite
a) Very high
b) Very low
d) Of the surrounding area
Source of the article: http://phys.org/news/2015-12-quantum-physics-problem-unsolvable-godel.html
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Know, who is Vijay Kelkar and what is PPP !
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Know, who is Yaduveer Krishnadatta Chamaraja Wadiyar !
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Know about Sepp Blatter!
Swpp Blatter, was re-elected as FIFA president for a fifth term at the 65th Annual Congress of FIFA held at Zurich for four year term.
Prince Ali bin al-Hussein of Jordan stood against Blatter in this election. It is worth mentioning that FIFA is going through a major controversy regarding corruption in the organisation with two FIFA vice presidents and a recently elected FIFA executive committee member still in custody.