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The Road to Reality: A Complete Guide to the Laws of the Universe [Paperback]

Roger Penrose
4.1 out of 5 stars  See all reviews (224 customer reviews)

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Book Description

January 9, 2007 0679776311 978-0679776314 Reprint
Roger Penrose, one of the most accomplished scientists of our time, presents the only comprehensive and comprehensible account of the physics of the universe. From the very first attempts by the Greeks to grapple with the complexities of our known world to the latest application of infinity in physics, The Road to Reality carefully explores the movement of the smallest atomic particles and reaches into the vastness of intergalactic space. Here, Penrose examines the mathematical foundations of the physical universe, exposing the underlying beauty of physics and giving us one the most important works in modern science writing.

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The Road to Reality: A Complete Guide to the Laws of the Universe + The Emperor's New Mind: Concerning Computers, Minds, and the Laws of Physics (Popular Science) + Cycles of Time: An Extraordinary New View of the Universe
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Editorial Reviews Review

If Albert Einstein were alive, he would have a copy of The Road to Reality on his bookshelf. So would Isaac Newton. This may be the most complete mathematical explanation of the universe yet published, and Roger Penrose richly deserves the accolades he will receive for it. That said, let us be perfectly clear: this is not an easy book to read. The number of people in the world who can understand everything in it could probably take a taxi together to Penrose's next lecture. Still, math-friendly readers looking for a substantial and possibly even thrillingly difficult intellectual experience should pick up a copy (carefully--it's over a thousand pages long and weighs nearly 4 pounds) and start at the beginning, where Penrose sets out his purpose: to describe "the search for the underlying principles that govern the behavior of our universe." Beginning with the deceptively simple geometry of Pythagoras and the Greeks, Penrose guides readers through the fundamentals--the incontrovertible bricks that hold up the fanciful mathematical structures of later chapters. From such theoretical delights as complex-number calculus, Riemann surfaces, and Clifford bundles, the tour takes us quickly on to the nature of spacetime. The bulk of the book is then devoted to quantum physics, cosmological theories (including Penrose's favored ideas about string theory and universal inflation), and what we know about how the universe is held together. For physicists, mathematicians, and advanced students, The Road to Reality is an essential field guide to the universe. For enthusiastic amateurs, the book is a project to tackle a bit at a time, one with unimaginable intellectual rewards. --Therese Littleton --This text refers to an out of print or unavailable edition of this title.

From Publishers Weekly

At first, this hefty new tome from Oxford physicist Penrose (The Emperor's NewMind) looks suspiciously like a textbook, complete with hundreds of diagrams and pages full of mathematical notation. On a closer reading, however, one discovers that the book is something entirely different and far more remarkable. Unlike a textbook, the purpose of which is purely to impart information, this volume is written to explore the beautiful and elegant connection between mathematics and the physical world. Penrose spends the first third of his book walking us through a seminar in high-level mathematics, but only so he can present modern physics on its own terms, without resorting to analogies or simplifications (as he explains in his preface, "in modern physics, one cannot avoid facing up to the subtleties of much sophisticated mathematics"). Those who work their way through these initial chapters will find themselves rewarded with a deep and sophisticated tour of the past and present of modern physics. Penrose transcends the constraints of the popular science genre with a unique combination of respect for the complexity of the material and respect for the abilities of his readers. This book sometimes begs comparison with Stephen Hawking's A Brief History of Time, and while Penrose's vibrantly challenging volume deserves similar success, it will also likely lie unfinished on as many bookshelves as Hawking's. For those hardy readers willing to invest their time and mental energies, however, there are few books more deserving of the effort. 390 illus. (Feb. 24)
Copyright © Reed Business Information, a division of Reed Elsevier Inc. All rights reserved. --This text refers to an out of print or unavailable edition of this title.

Product Details

  • Paperback: 1136 pages
  • Publisher: Vintage; Reprint edition (January 9, 2007)
  • Language: English
  • ISBN-10: 0679776311
  • ISBN-13: 978-0679776314
  • Product Dimensions: 9.3 x 6.2 x 2 inches
  • Shipping Weight: 2.4 pounds (View shipping rates and policies)
  • Average Customer Review: 4.1 out of 5 stars  See all reviews (224 customer reviews)
  • Amazon Best Sellers Rank: #62,108 in Books (See Top 100 in Books)

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Customer Reviews

Most Helpful Customer Reviews
548 of 561 people found the following review helpful
3.0 out of 5 stars Roadmap Not Road December 18, 2005
Let me confess at the outset that I have a PhD in theoretical physics that I gained in 1969. The subject matter was quantum electrodynamics. However, I have worked my entire life in the computer industry. Despite this, I have always kept a background interest in physics. I've retained quite a lot of my original mathematical knowledge but have obviously become relatively rusty. Over the years, I've enjoyed reading several of Roger Penrose's books and found all of them provocative. I bought this book because I thought it would quickly explain to me the latest ideas involved in reconciling relativity and quantum mechanics and lead me to the most recent ideas in dealing with gravity waves, for example.

The book started with a disarming claim to be able to teach a non- mathematician sufficient of the maths to be able to follow the arguments being set out. It even invited the reader to skip the detail of the maths where this became an obstacle. With my background, I therefore settled down for an engaging read. Boy, was I in for a surprise!

The alarm bells began to ring when early on, I passed through the explanations of calculus. Although I obviously had no difficulty in understanding Penrose, I could easily see that a neophyte would not be able to pick up the subject with the limited explanations given. Soon, at around 300 pages in, I crashed into a personal lack of knowledge and, sure enough, Roger Penrose's explanations left me floundering. As a result, I had to put the book to one side and fill in the gaps in my knowledge from other sources. Eventually, I was able to return to the book. However, this became a recurring process - I found that, on several occasions, I had to put the book to one side and educate/re-educate myself from the texts of others.
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667 of 689 people found the following review helpful
4.0 out of 5 stars Not for the faint of heart November 16, 2004
By MikeF
The first half of this extremely challenging book takes the reader through huge swathes of mathematical territory - hyperbolic geometry, complex numbers, complex calculus, Riemann surfaces, n-manifolds and many more topics are covered.

These chapters don't just convey a general impression of each subject in laymans English, but make heavy use of formulae and mathematical notation, effectively letting the maths do the talking where a more 'pop' science book would be breaking out the strained analogies.

Although Penrose takes care to provide the reader with all groundwork necessary to understanding these subjects, this is still fundamentally difficult and unintuitive stuff and non-mathematicians will find that each page requires heavy concentration; skipping or skimming any part of these chapters renders later chapters unintelligible. Still, careful reading reaps huge rewards - the ideas these chapters cover are deep and beautiful.

The big payoff comes in the second half of the book, where the topics covered in the first half are applied to our current understanding of the nature of our universe.

Classical physics, relativity, various aspects of quantum mechanics, string theory and twistor theory (and more besides) are covered, and the first half of the book is revealed as a primer necessary to fully understanding this material.

It's worth repeating - this is a very, very heavyweight book for non-mathematicians. As someone with only a strong laymans knowledge of maths, I found most of the book very difficult indeed. I often had to read each chapter three or four times with a break in between each reading for the material to sink in.
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537 of 574 people found the following review helpful
5.0 out of 5 stars A panorama of science. February 26, 2005
Format:Hardcover|Verified Purchase
It's a delicate balance for book: Encyclopedic vs well focused on a unifying theme!

Penrose succeeds admirably. It's not boring! Books like this are few and far between. Indeed, there are preciously few authors who manage to successfully guide beginning students into serious scientific topics; and even fewer who can see the big picture, and do it all. And then keeping our attention through more than 1000 pages! Penrose's book is inspiring, informative, exciting; and at the same time it's honest about what math and physics are. It is modest when modesty is called for. You are not cheated. You do get the equations (not just hand waving!), but you are gently prepared in advance, so you will want the mathematical formulae. Penrose's book is likely to help high school students getting started in science; and to inspire and inform us all. There is something for everyone: for the beginning student in math or in physics, for the educated layman/woman (perhaps the students' parents), for graduate students, for teachers, for scientists, for researchers; and the list goes on.

It is one of the very few books of this scope that is not intimidating. Not in the least!

I can't begin to do justice to this terrific book. Get it, and judge for yourself. I will also not give away the ending, other than saying that the title of the book is a good hint. And you will be able to form your own take, and your own ideas on the conclusion. Like with all good and subtle endings, they can be understood and appreciated at several levels.

I came across Penrose's book in my bookstore by accident, and I was at first apprehensive: The more than 1000 pages, and the 3.3 pounds are enough to intimidate anyone. But when I started to read, I found myself unable to put it down.
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Most Recent Customer Reviews
4.0 out of 5 stars I almost couldnt read this -- very deep and hard ...
I almost couldnt read this -- very deep and hard to understand -- tiny choices and what really is going on all around us and the subtle or large changes your thoughts and actions... Read more
Published 8 days ago by Wesley A. Ornick
5.0 out of 5 stars it is recommended that one should read this book in conjunction with...
(Reviewed by S.K.SAGAR)
I bought the Penrose book ``The Road to Reality`` about 5 years back. Read more
Published 11 days ago by SURENDRA KUMAR SAGAR
5.0 out of 5 stars I was bland but now I kin see!
Good golly Miss Molly, I nearly sprang my wrist when I took this book off the shelf down at the Saint Vincent de Paul thrift store here where I live. Read more
Published 1 month ago by William A Baurle
5.0 out of 5 stars Remarckable book!
I was advised of this book by a friend. It is a remarckable book indeed! I do not know of another book that can transport the novice to some understanding of contemporary physics! Read more
Published 1 month ago by Mariano S Silva
5.0 out of 5 stars A gift from a preeminent master.
Presented in roughly three parts, ....mathematical foundations, ....empirically established theories, ....and speculative theories in need of an observational basis,... Read more
Published 1 month ago by Noumenon
5.0 out of 5 stars A Baseline for All Knowlege of Math and Physics
Many reviewers are harping on the mathematical density of this book as the cause of its failure. But, although I couldn't comprehend 90% of the math, I needed this book to lay out... Read more
Published 2 months ago by Harold E. Taylor
5.0 out of 5 stars Havent read it yet
I am leaving it for some time,(have other stuff to do, which are important) because i know it will take a great stretch to read it. Read more
Published 3 months ago by Đorđe
5.0 out of 5 stars Discussion of Entropy plus much more
The entropy of the universe part was by itself worth the time and money spent - just fascinating. The rest of the book is very long and the mathematics is frequently above my... Read more
Published 6 months ago by James Bonhamton
5.0 out of 5 stars The Greatest Book Ever Written
After reading this, you realize the name should be "The Road to Realities" (plural). Not only does Penrose demonstrate the relativity of all things, but also the creation... Read more
Published 6 months ago by G. Barton
4.0 out of 5 stars Roger Penrose at the top of his game.
Not the easiest of reads, but a real anchor to reality. You can also take a look at his earlier works.
Published 6 months ago by Samdu
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Topic From this Discussion
Albert Einstein's theory of gravity is generally explained in a wrong way
Your conclusion is silly. Some of your assertions are flat out wrong and others are not thought through. To sum up what's wrong with your post, I can easily point to your 7th point and conclusion. General Relativity (GR) is not taught to middle schoolers and high schoolers because trying to teach... Read More
May 21, 2011 by Jonathan |  See all 4 posts
Supplemental texts?
Readers of "Road to Reality" will find my math & physics books useful in learning the math & theory, including "Relativity Demystified", "Quantum Mechanics Demystified" and "Linear Algebra Demystified". My books show lots of explicitly solved problems. You... Read More
Mar 1, 2006 by David McMahon |  See all 6 posts
Amazon marketplace is ready when you are if you do not need a doorstop. Keeping mine though, off the floor.
Oct 25, 2006 by Interested Observer |  See all 3 posts
Welcome to the The Road to Reality forum
Actually the analogy is mostly wrong:

When you turn the crank backwards 25 times, that is NOT the sqrt(-25) NOR "5i" times, but rather

(-1) x sqrt(25) = -5 times

"i" is the number that when multiplied by itself gives -1. No such square root exists for -1 in the... Read More
Jan 19, 2006 by H. Martin |  See all 9 posts
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