28 Jan, 2016
400 Times Read.
RSS Feed for this Article
Worksheets on Current Topics for Banking English Test Papers – XV
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?
Mysterious Radio signals – Theory of Relativity
A new way to test one of the basic principles underlying Einstein’s theory of General Relativity using brief blasts of rare radio signals from space called Fast Radio Bursts is ten times, to one-hundred times better than previous testing methods that used gamma-ray bursts, according to a paper just published in the journal Physical Review Letters. The paper received additional highlighting as an “Editor’s Suggestion” due to “its particular importance, innovation, and broad appeal,” according to the journal’s editors.
The new method is considered to be a significant tribute to Einstein on the 100th anniversary of his first formulation of the Equivalence Principle, which is a key component of Einstein’s theory of General Relativity. More broadly, it also is a key component of the concept that the geometry of spacetime is curved by the mass density of individual galaxies, stars, planets, and other objects
Fast Radio Bursts are super-brief blasts of energy—lasting just a few milliseconds. Until now, only about a dozen Fast Radio Bursts have been detected on Earth. They appear to be caused by mysterious events beyond our Milky Way Galaxy, and possibly even beyond the Local Group of galaxies that includes the Milky Way. The new technique will be important for analyzing the abundance of observations of Fast Radio Bursts that advanced radio-signal observatories, now being planned, are expected to detect.
“With abundant observational information in the future, we can gain a better understanding of the physical nature of Fast Radio Bursts,” said Peter Mészáros, Holder of the Eberly Family Chair in Astronomy and Astrophysics and Professor of Physics at Penn State, the senior author of the research paper. Like all other forms of electromagnetic radiation including visible light, Fast Radio Bursts travel through space as waves of photon particles. The number of wave crests arriving from Fast Radio Bursts per second—their “frequency”—is in the same range as that of radio signals. “When more-powerful detectors provide us with more observations,” Mészáros said, “we also will be able to use Fast Radio Bursts as a probe of their host galaxies, of the space between galaxies, of the cosmic-web structure of the universe, and as a test of fundamental physics.”
The impact of the new method using Fast Radio Bursts is expected to increase significantly as more of the bursts are observed, and if their origin can be established more firmly. “If Fast Radio Bursts are proven to originate outside the Milky Way Galaxy, and if their distances can be measured accurately, they will be a new powerful tool for testing Einstein’s Equivalence Principle and for extending the tested energy range down to radio-band frequencies,” Mészáros said.
Einstein’s Equivalence Principle requires that any two photons of different frequencies, emitted at the same time from the same source and traveling through the same gravitational fields, should arrive at Earth at exactly the same time. “If Einstein’s Equivalence Principle is correct, any time delay that might occur between these two photons should not be due to the gravitational fields they experienced during their travels, but should be due only to other physical effects,” Mészáros said. “By measuring how closely in time the two different-frequency photons arrive, we can test how closely they obey Einstein’s Equivalence Principle.”
- a) Element
- b) Property
- c) Substitute
- d) Beneficiary
- a) Distasteful
- b) Quantitative
- c) Plentiful
- d) Sumptuous
- a) Probably
- b) Correct
- c) Get into
- d) Examine
- a) Lowest point
- b) Highest point
- c) Mid-point
- d) Base point
The Swedish newspaper was recently asked it to delete the reference made by President Pranab Mukherjee to the Bofors scam in an interview to it, as a claim protested by the Indian Government on 27 May 2015. India has expressed disappointment over the disrespect shown to the President, the newspaper has defended its right to publish what was said during the interview.
Know, who is Vijay Kelkar and what is PPP !
Vijay Kelkar is a renowned economist and a former Finance Secretary. He was appointed head of newly constituted committee to give recommendations to recast the model of Public-Private-Partnership (PPP) model in India. India is one of the largest PPP market with over 900 projects. The Kelkar committee will review the PPP policy, suggest a better risk-sharing mechanism between private developers and the government after analysing such projects.
Know, who is Yaduveer Krishnadatta Chamaraja Wadiyar !
Yaduveer Krishnadatta Chamaraja Wadiyar was crowned as the new Maharaja of of Mysuru (Mysore) royal family. He is the 23-year old grandson of Princess Gayathri Devi, who was the eldest daughter of the last Maharaja of Mysore, Sri Jayachamarajendra Wadiyar. The coronation was held at Mysuru’s famous Amba Vilas Palace, which was decked up for the occasion.
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.