A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Sen, D. K.
- Indian Connection to the World of Radio ASTRONOMY
Authors
1 GSI, ISEC, IN
Source
Indian Science Cruiser, Vol 31, No 2 (2017), Pagination: 41-45Abstract
Radio Astronomy had to face an almost unassailable hurdle in pursuing its attempts to unravel the mysteries of the cosmos due to the characteristics of the radio signals emitted from our Milky Way and the galaxies. Discovery of Radio Interferometry provided the much awaited breakthrough to create radio telescopes of huge dimensions which was hitherto considered unrealistic to achieve. With gradual development of research, useful devices such as Large Array and Very Large Array Interferometers equipped with improved Base Line values and use of technique of Aperture Synthesis, radio astronomy grew to explore the entire radio sky successfully and interpreted the data collected to derive information for a better understanding of the phenomena like Big Bang, supernova explosions, supermassive stars, dwarf galaxy, black hole, and dark matter&energy. A brief account of the development in this field has been attempted to be discussed in a popular way.Keywords
Radio Frequency Signals, Radio Interferometry, Radio Telescope, very Long Base Line Interferometer, very Large Base Line Array, Base Line, Aperture Synthesis, Giant Metrewave Radio Telescope, Fast Radio Bursts, Magnetars.
References
- Interferometry in Radio Astronomy-WIKIPEDIA
- Science & Astronomy-SPACE.com
- Interferometry and Synthesis in Radio Astronomy- Thomson, A. Richard, Mason, James M, Swanson Jr., George W., 2008, Springer.
- Base Line in Radio Astrnomy-Planet Facts.org
- Giant Metrewave Radio Telescope- G. Swarup, S.Ananthakrishnan, V.K. Kapahi, A.P.Rao, C.R.Subrahmanya, V.K. Kulkarni, 1991,Current Science, Vol. 60, No-2.
- Mysterious Alien Signals-ABIGAIL BEALL, MAIL ONLINE, Jan ^ 2017.
- Is Clean Energy That 'Clean'?
Authors
1 GSI, IN
Source
Indian Science Cruiser, Vol 25, No 2 (2011), Pagination: 56-58Abstract
The latest fury of Nature that caught mankind all over the world totally unaware, once again reminded the human civilization that their boast of supremacy over nature could be dwarfed at any moment at its whim. Yes, it is the 8.9 magnitude earthquake that shook the entire stretch of North- East coast of Japan on Friday the 11th of March 2011. It was followed by huge 7 m high tsunami waves sweeping 6/7 Km inland submerging and destroying large number of towns and villages. The agonizing devastation has been brought to notice well to the people through TV and print media coverages. It is estimated that no less than 10,000 people in the affected region have died and more than double the number being reported missing. About 5 lakh people have been evacuated from the areas, rescue operations are still on. Japan's awful misery and extreme sufferings did not end there.
- In quest of the Science of Cloud Formation
Authors
1 GSI, Kolkata, IN
Source
Indian Science Cruiser, Vol 26, No 1 (2012), Pagination: 10-11Abstract
The classical experiment conducted by C T R Wilson which led to the discovery of Cloud Chamber almost a century ago was the first step towards the understanding of the methodology of cloud formation by ion droplet processes. Henceforth extensive laboratory studies established the general belief that aerosols, the liquid or solid particles greater than 100 nm in size suspended in the atmosphere nucleated by clustering, provide the seed particles for cloud formation.
- From Bose’s Boson to The Higgs
Authors
1 GSI, Kolkata, IN
Source
Indian Science Cruiser, Vol 26, No 5 (2012), Pagination: 64-65Abstract
On July the 4th, 2012, all over the world, people in general, and the scientific communities in particular, were extremely delighted by an extraordinary broadcast made by Joe Incandella and Fabiola Gianotti, the heads of the experiments CMS and ATLAS located in the opposite sides of the Large Hadron Collider (LHC). They announced that they have been almost certain to have detected a particle identified to be the Higgs boson from its observed properties, specially its mass, as predicted by the theory. The main procedure basically consisted of two streams of protons travelling in opposite directions, with a tremendous speed nearing that of light, accelerated through a circular tunnel, 27km in circumference coming to collide headon. The project has been carried out under the particle physics laboratory at CERN near Geneva. As an introduction to the understanding of the Higgs particle, a review of the nature of the particle boson originally conceptualized by the Indian physicist. Prof. Satyendranath Bose and further elaborated by Prof Einstein would be relevant.
- Hundred Years of Einstein’s General Theory of Relativity
Authors
1 Geological Survey of India, Res: 31C, N K Ghoshal Road, Kasba, Surki Kal. Kolkata - 700042, IN
Source
Indian Science Cruiser, Vol 29, No 3 (2015), Pagination: 48-53Abstract
In this hundredth year of the existence of the General Theory of Relative an attempt has been made to highlight and outline the basic facts of this ingenious theory developed around intricate and complex mathematical derivations, in a simple and popular way as far as practicable, for the general readers. Mainly the physical ideas and facts obtained from the theory along with its application in the cosmic world to achieve the goal of its experimental validation has been discussed. The failure of general relativity to accommodate quantum theory and its consequences has also been touched.
Keywords
Space-Time, Time Dilation, Cluster of Galaxies, Dark Matter, Neutron Star, Pulsars, Black Holes, Cosmological Constant, Horizon, Curved Space, Geodesics, Gravitational Radiation.- Geographical Information System: Its Inroad into History
Authors
1 Kolkata, IN
Source
Indian Science Cruiser, Vol 23, No 5 (2009), Pagination: 13-14Abstract
No Abstract.- Black Hole Fetches Physics Nobel 2020
Authors
1 Indian Science Cruiser
Source
Indian Science Cruiser, Vol 35, No 2 (2021), Pagination: 40-42Abstract
It is a description of a scientific phenomenon, called black hole, based on simple conceptual ideas to underline the theoretical & experimental evidence of its existence. Starting from the earlier works on black hole to the latest state of its development which made it so close to reality, such that it could attract the attention of the Nobel committee to select the particular subject fit for the award of the prize, have been discussed.Keywords
Black hole, physics, Nobel Prize 2020, general relativity.References
- History of Development of the Idea of Black holeAmazing Space STScI.
- A Brief History of Mind Bending Ideas about Black holes- Adam Mann- WIRED.
- Black Hole: Encyclopedia of Astronomy & Astrophysics.
- Detection of Black Holes- The Gale Encyclopedia of Science.
- Recent Progress on the Black Hole Information Paradox: Raghu Mahajan; Resonance, Jan21 (Indian Academy of Sciences).
- Kerr Rotating Black Hole Structure- WIKIPEDIA.
- Roy Patrick Kerr- Google.
- The Theoretical Foundation for Black Holes and the Supermassive Compact Object at the Galactic Center- The Nobel Committee for Physics 2020.
- Rein Hard Genzel & Andrea Ghez- Literatures available with Google search.