T. Padmanabhan's After the First Three Minutes: The Story of Our Universe PDF

By T. Padmanabhan

ISBN-10: 0521620392

ISBN-13: 9780521620390

The evolution of our Universe and the formation of stars and galaxies are mysteries that experience lengthy wondered scientists. fresh years have introduced new medical knowing of those profound and basic concerns. In full of life prose, Professor Padmanabhan paints an image of up to date cosmology for the final reader. not like different renowned books on cosmology, After the 1st 3 mins doesn't gloss over info, or turn away from explaining the underlying recommendations. in its place, with a lucid and casual variety, the writer introduces the entire suitable historical past after which conscientiously items jointly an enticing tale of the evolution of our Universe. Padmanabhan leaves the reader with a cutting-edge photo of scientists' present realizing in cosmology and a prepared flavor of the buzz of this fast-moving technological know-how. all through, no arithmetic is used and all technical jargon is obviously brought and bolstered in a convenient thesaurus on the finish of the ebook. For basic readers who are looking to come to grips with what we actually do and do not find out about our Universe, this ebook offers an exhilarating and uncompromising learn. Thanu Padmanabhan is a Professor at Inter-University Centre for Astronomy and Astrophysics in Pune, India. he's the recipient of diverse awards and writer of 3 books, constitution Formation within the Universe (Cambridge, 1994), Cosmology and Astrophysics via difficulties (Cambridge, 1996), and, including J.V. Narlikar, Gravity, Gauge Theories and Quantum Cosmology. he's additionally the writer of multiple hundred well known technology articles, a comic book strip serial and several other average columns on astronomy, leisure arithmetic, and the historical past of technological know-how.

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Additional resources for After the First Three Minutes: The Story of Our Universe

Example text

The electric force acts between particles carrying electric charge. Particles can have positive, negative or zero electric charge. ) A positively charged particle will repel another positively charged particle while attracting a negatively charged particle; similarly a negatively charged particle will repel a negatively charged particle but will attract a positively charged particle. Neutral particles do not feel any electrical force. The force of attraction or repulsion increases in direct proportion to the electric charge of the particle.

Thus, according to our current understanding, we can interpret all forces of nature using the picture of quarks, leptons and vector bosons. Of these, quarks and leptons act as basic building blocks of matter, while the vector bosons mediate the interaction between the particles. For the sake of completeness, we must mention another complication. It turns out that every particle in nature has an 'antiparticle'. For example, there exists a particle called the positron which is identical to the electron in all respects except the electric charge.

2 Forces of nature Firstly, the gravitational force is always attractive while the electromagnetic force can be either attractive or repulsive depending on the nature of the charges. Secondly, this force is extremely weak; in fact, it is weaker than even the weak nuclear force at comparable distances. The gravitational force between two protons is 10 36 times weaker than the electromagnetic force between them. Lastly, the gravitational force increases in direct proportion with the mass of the particles.

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After the First Three Minutes: The Story of Our Universe by T. Padmanabhan


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