Did Time Begin? Will Time End? Maybe The Big Bang Never Occurred by Paul H Frampton (PDF)

Description

Although everyone is familiar with the concept of time in everyday life and has probably given thought to the question of how time began, recent scientific developments in this field have not been accessible in a simple understandable form. This book is important as it presents to readers current ideas about the role of time in theoretical cosmology.Recent observational discoveries, especially that the expansion rate of the universe is accelerating, have revolutionized the understanding of the energy content of the universe. This development leads to new possibilities for the beginning and end of cosmological time. This book emphasizes the notion of entropy and describes how it is theoretically possible that the universe may end in a finite time or that time can cycle and never end.Provided here is twenty-first century scientific knowledge, written by one of the world’s most eminent theoretical physicists, that will better enable the public to discuss further the fascinating idea of time. It is ideally suited also for young people considering a career in scientific research.

User’s Reviews

Reviews from Amazon users which were colected at the time this book was published on the website:

⭐This is a delightful little book (100 pages), well written and didactic. 80% of it is relatively easy to understand. (One comment only: in page 22 it is claimed that the diameter of the present visible universe is roughly 30 billion light-years whereas other sources such as Wikipedia give a number about 5 times larger due to the expansion of the universe).Regarding the origin and fate of the universe there are four possibilities: origin and end in finite time, origin and end in infinite time, origin in finite time and duration forever, and an infinitely old universe with an end in a finite time from now.It seems the last possibility is hardly ever considered and the present orthodoxy is the second possibility: our universe (or rather our bubble universe) originated 13.7 billion years ago and will never end. However the author finds more aesthetically pleasing a cyclic universe, infinitely old and never really ending. I tend to agree with him.Naturally he has to deal (as others who favor cyclic universes do)with the second law of thermodynamics as the new universe has to restart with low entropy. This is the most obscure part of the book and is explained quickly in the last pages invoking the concepts of 3 branes and causal patch (in about a trillion years the Big Rip disconnects the universe in an astronomical number of patches devoid of matter, with a vanishing number of photons and dark energy which has zero entropy. Our universe is a 3-brane, but is accompanied by another 3-brane, both existing in (at least) a five dimensional spacetime. This system introduces a critical term in the Friedman equation and this is responsible for the change from expansion to contraction and the bounce back of one of the patches into a new universe.As we can see, scientists are entering the realm of philosophy , although with sophisticated mathematical arguments. At present, these are speculations which are attractive, but none of these speculations is still a testable (at least in the short term) well grounded theory.

⭐This book does not add anything new which is not contained in Hawking’s and Carroll’s book on Time, it also repeats the same misconstrued association of the entropy with time. The title does, however, pose two important questions about time: Did Time Begin? And will it End? Playing it safe, he offers no answers, so why write a book about it? Rather, he claims that answering these questions will have a profound effect on how we see our role in the Universe. What effect the answers to these questions will have on our lives is not broached.

⭐

Keywords

Free Download Did Time Begin? Will Time End? Maybe The Big Bang Never Occurred in PDF format
Did Time Begin? Will Time End? Maybe The Big Bang Never Occurred PDF Free Download
Download Did Time Begin? Will Time End? Maybe The Big Bang Never Occurred 2009 PDF Free
Did Time Begin? Will Time End? Maybe The Big Bang Never Occurred 2009 PDF Free Download
Download Did Time Begin? Will Time End? Maybe The Big Bang Never Occurred PDF
Free Download Ebook Did Time Begin? Will Time End? Maybe The Big Bang Never Occurred