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The Nature of Space and Time
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Who doesn't love a good argument? When physics heavyweights Stephen Hawking and Roger Penrose delivered three sets of back-and-forth lectures capped by a final debate at Cambridge's Isaac Newton Institute, the course of modern cosmological thinking was at stake. As it happens, The Nature of Space and Time, which collects these remarks, suggests that little has changed from the days when Einstein challenged Bohr by refusing to believe that God plays dice. The maths is more abstruse, the arguments more refined, but the argument still hinges on whether our physical theories should be expected to model reality or merely predict measurements.
Hawking, clever and playful as usual, sides with Bohr and the Copenhagen interpretation, and builds a strong case for quantum gravity. Penrose, inevitably a bit dry in comparison, shares Einstein's horror at such intuition-blasting thought experiments as Schrödinger's long-suffering cat--and scores just as many points for general relativity. The maths is tough going for lay readers, but a few leaps of faith will carry them through to some deeply thought-provoking rhetoric. Though no questions find final answers in The Nature of Space and Time, the quality of discourse should be enough to satisfy the scientifically curious. --Rob Lightner
Amazon.com
Who doesn't love a good argument? When physics heavyweights Stephen W. Hawking and Roger Penrose delivered three sets of back-and-forth lectures capped by a final debate at Cambridge's Isaac Newton Institute, the course of modern cosmological thinking was at stake. As it happens, The Nature of Space and Time, which collects these remarks, suggests that little has changed from the days when Einstein challenged Bohr by refusing to believe that God plays dice. The math is more abstruse, the arguments more refined, but the argument still hinges on whether our physical theories should be expected to model reality or merely predict measurements.
Hawking, clever and playful as usual, sides with Bohr and the Copenhagen interpretation and builds a strong case for quantum gravity. Penrose, inevitably a bit dry in comparison, shares Einstein's horror at such intuition-blasting thought experiments as Schrödinger's long-suffering cat--and scores just as many points for general relativity. The math is tough going for lay readers, but a few leaps of faith will carry them through to some deeply thought-provoking rhetoric. Though no questions find final answers in The Nature of Space and Time, the quality of discourse should be enough to satisfy the scientifically curious. --Rob Lightner
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In spite of the errors mentioned in another review the discussion was fairly interesting but not as great a "debate" as I anticipated. I'd spend my money on Penrose's "The Emporer's New Mind" before this one. For those interested in Black Holes, Kip Thorne's "Black Holes and Time Warps ..." is exceptionally well written and rewarding for the reader. For the technically [mathematically] apt who wants an fascinating treatice on spacetime, try John Wheeler and Ignazio Ciufolini's book on Geometrodynamics (Princeton Univ. Press).
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Apart from the elementary, undergraduate level errors in thermodynamics, e.g. the first law of thermodynamics on page 24 is NOT the first law, nor is it a combination of the first and second laws due to a sign error; the Helmholtz free energy on page 50 is NOT the Helmholtz free energy again due to a sign error; the statement on page 135 that all Einstein needed not to go fishing after 1925 was 'Stephen's discovery, fifty-five years later, of black hole radiation' is offensive! Hawking's great surprise, on page 43, that black hole radiation emission was exactly thermal with a temperature derived from the Bekenstein-Hawking expression for black hole entropy in terms of the area of the horizon is ludicrous because it has to correspond to the entropy of black body radiation, which it doesn't. The above are merely examples which serve to call into question the contributions of these two researchers and certainly raise grave doubts concerning the worth of this book.
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I dug deeper into my sleeping bag and looked out into the universe. I was thankful for the Earth's attraction which held me close. The air was so thick with stars I was almost breathing them. Was there an end to the universe? How much stuff was really out there? How did it all begin? Why can't we remember the future or relive our mistakes?
Well, these questions didn't keep me awake for very long that night, but "The Nature of Space and Time" is a step toward answering them. This book, covering several lectures and a final debate between Stephen Hawking and Roger Penrose, provides insight into the prevailing wisdom.
They are two of the greatest minds of our century. Stephen is interested in answers to the extent that they lead toward practical or predictable solutions. Roger is interested in answers to the extent that they lead to a more complete understanding of reality. This difference between them makes the debate a lively and at times amusing one.
Copyright 1997 by Barbara Grant Ashton
Well, these questions didn't keep me awake for very long that night, but "The Nature of Space and Time" is a step toward answering them. This book, covering several lectures and a final debate between Stephen Hawking and Roger Penrose, provides insight into the prevailing wisdom.
They are two of the greatest minds of our century. Stephen is interested in answers to the extent that they lead toward practical or predictable solutions. Roger is interested in answers to the extent that they lead to a more complete understanding of reality. This difference between them makes the debate a lively and at times amusing one.
Copyright 1997 by Barbara Grant Ashton
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