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Reality Is Not What It Seems: The Elusive…
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Reality Is Not What It Seems: The Elusive Structure of the Universe and… (2014 original; edició 2017)

de Carlo Rovelli

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7161524,305 (4.16)42
"The man who makes physics sexy . . . the scientist they're calling the next Stephen Hawking." --The Times Magazine From the New York Times-bestselling author of Seven Brief Lessons on Physics and The Order of Time, a closer look at the mind-bending nature of the universe. What are the elementary ingredients of the world? Do time and space exist? And what exactly is reality? Theoretical physicist Carlo Rovelli has spent his life exploring these questions. He tells us how our understanding of reality has changed over the centuries and how physicists think about the structure of the universe today. In elegant and accessible prose, Rovelli takes us on a wondrous journey from Democritus to Albert Einstein, from Michael Faraday to gravitational waves, and from classical physics to his own work in quantum gravity. As he shows us how the idea of reality has evolved over time, Rovelli offers deeper explanations of the theories he introduced so concisely in Seven Brief Lessons on Physics. This book culminates in a lucid overview of quantum gravity, the field of research that explores the quantum nature of space and time, seeking to unify quantum mechanics and general relativity. Rovelli invites us to imagine a marvelous world where space breaks up into tiny grains, time disappears at the smallest scales, and black holes are waiting to explode--a vast universe still largely undiscovered.… (més)
Membre:TairaNagasawa
Títol:Reality Is Not What It Seems: The Elusive Structure of the Universe and the Journey to Quantum Gravity
Autors:Carlo Rovelli
Informació:Riverhead Books, Kindle Edition, 288 pages
Col·leccions:La teva biblioteca
Valoració:***
Etiquetes:No n'hi ha cap

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Reality Is Not What It Seems: The Journey to Quantum Gravity de Carlo Rovelli (2014)

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Rovelli gives us a magnificent summary of the history of Western theories of the nature and structure of the universe, starting from Anaximander, Democritus, and Epicurus, making a brief detour to Aristotle, then on through Copernicus, Galileo, and Newton, to Faraday and Maxwell, then Einstein's special and general relativity, finally on to the quantum theorists, ending with several chapters on quantum gravity. As he proceeds, he shows how the concepts of what the world is made of have come and gone in scientific understanding, from space, time, particles, through fields, spacetime, quantum fields, and beyond. All this he does in plain prose, without getting into the mathematics, except for a few unfortunate footnotes that are apparently intended to remind professional physicists that he does, in fact, understand the math himself. Delightful! ( )
  JohnNienart | Jul 11, 2021 |
I'll be honest and up front, I only wanted to read more into Loop Quantum Gravity.

Say what?!? Well, it's the leading contender against String theory. It doesn't try to mash together the main problem area of gravity with quantum mechanics, but rather extends quantum mechanics as a granular geometric equation into the macro realm of what we understand as special relativity.

In other words, Reality is finite, quantifiable, and can be extrapolated from the underpinnings of the general field of quantum mechanics.

If you know anything about the underlying basis of string theory, this idea is both flabbergasting and simplistic. And maybe, it's also correct.

I can't say for certain, and as far as I can tell, neither can the author. Most of the book gives us a survey of the underpinnings of reality physics from the conceptualization of the atom through Einstein's reformulation of heat energy on the equilibrium of those atoms in their environmental matrices. (E=MC squared)

Spin Foam is the name of the minimum Planck distance that forces atoms into discrete and quantifiable distances between each other. It's the reason why atoms don't just fall into singularities like black holes or crushed neutronium states under normal gravitic circumstances. It's not merely probability shells and energy levels, but quantum loops that behave like bubbles forcing certain distances... and therefore forcing Matter to behave the way it apparently behaves... making atomic structure.

The most interesting idea I'm getting from this is the idea of the Big Bounce. In other words, the cause of the great expansion once the Big Bang got lit. It reminds me a lot of how iron molecules make stars burp in the process of digesting (fusion) and cause a nova. Only we're dealing with a quantum state that coaxes atoms into creation through special wave functions behaving like granular notations. You know, like how light behaves like both a wave and a particle.

And beyond this... I'm completely lost. :)

I don't know the math but this book is pretty decent on the conceptual side. The basics are commonplace and I was mainly into it for the later weird stuff.

But all in all? Rovelli is a very, very good writer. Convincing. Clear.

It may not be the answer to the great question of our day and age, but he makes a very good case. :) ( )
  bradleyhorner | Jun 1, 2020 |
De wetenschap evolueert voortdurend. En maar goed ook. Maar dat maakt ook dat als je als leek wat wil bijblijven regelmatig een overzichtsboek moet doornemen. De laatste decennia gaan heel wat van die boeken over de aanhoudende pogingen van wetenschappers om de algemene relativiteitstheorie (over het heel grote) te verenigen met de theorie van de quantummechanica (over het heel kleine). En niet al die pogingen blijken even veel belovend of werden intussen al door experimenten weerlegd. Zo zul je hier weinig of niets lezen over snaartheorie of over de M-theorie. Rovelli neemt de lezer eerst nog eens mee doorheen de evolutie van de fysica met een voorliefde om vele zaken terug te koppelen aan de Griekse filosoof Democritus. Zo krijg je hier dus nog eens op een drafje de Newtoniaanse kijk op de wereld, Einsteins speciale en algemene relativiteitstheorie en daarna de quantummechanica met coryfeeën als Bohr, Heisenberg en Dirac gepresenteerd. En als je daarover al eens wat hebt gelezen, hoeft dat geen bezwaar te zijn. Rovelli vertelt alles toch weer iets anders dan anderen dat al deden, en dat is voor de lezer enkel een verrijking. In het tweede deel van dit boek schuift Rovelli dan de quantumzwaartekracht en lusquantumzwaartekracht naar voor als poging om de algemene relativiteitstheorie en de quantummechania samen te brengen, om daarna te eindigen met enkele speculatieve, nog weinig onderzochte ideeën (o.a. over thermische tijd).
Doorheen de evolutie van de fysica verandert ook telkens ons beeld van de wereld. Op dit moment is het "een wereld die niet in de ruimte bestaat en niet in de tijd evolueert. Een wereld die alleen uit quantumvelden in interactie bestaat, waarin het wemelen van de quanten in een dicht web van wederzijdse interacties ruimte, tijd, deeltjes, golven en licht genereert" (p. 235) Wil je begrijpen wat deze zin wil zeggen, neem dit boek dan ter hand en ga mee op een bevreemdende reis doorheen wat toch onze wereld is. ( )
  rvdm61 | Apr 12, 2020 |
The subtitle says "The Journey To Quantum Gravity". And a long journey it surely is, for only 20-30% of this book deals with quantum gravity and too much with pre-Einsteinian high school physics. The explanations are fluid and intuitive, but for about 1/3rd of the book they're not about the subject matter you chose to read the book for. ( )
  pod_twit | Mar 30, 2020 |
This is an interesting history of how the theory of Quantum Gravity developed, and it attempts to describe the nature of Quantum Gravity with the proviso that we still know very little about it. It is a road-trip taking in ancient philosophers, challengers of accepted wisdom, and geniuses whose insights initiated ridicule from their peers only to find their ideas supported by experimentation and measurement when they became possible.

This is a book that takes pride in the uncertainty of Science and how scientists delight in pushing the boundaries of knowledge by discovering secrets that undermine current scientific thoughts and replace them with improved concepts and theories that will themselves be questioned and improved in the future. ( )
  pgmcc | Jan 20, 2020 |
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Nom de l'autorCàrrecTipus d'autorObra?Estat
Carlo Rovelliautor primaritotes les edicionscalculat
Carnell, SimonTraductorautor secundarialgunes edicionsconfirmat
Czerny, MichałTraductorautor secundarialgunes edicionsconfirmat
Heinemann, EnricoTraductorautor secundarialgunes edicionsconfirmat
McMillan, RoyNarradorautor secundarialgunes edicionsconfirmat
Perhoniemi, TuukkaTraductorautor secundarialgunes edicionsconfirmat
Segre, EricaTraductorautor secundarialgunes edicionsconfirmat
Stoker, JamieAuthor photoautor secundarialgunes edicionsconfirmat
Vighetti, PatrickTraductorautor secundarialgunes edicionsconfirmat

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"The man who makes physics sexy . . . the scientist they're calling the next Stephen Hawking." --The Times Magazine From the New York Times-bestselling author of Seven Brief Lessons on Physics and The Order of Time, a closer look at the mind-bending nature of the universe. What are the elementary ingredients of the world? Do time and space exist? And what exactly is reality? Theoretical physicist Carlo Rovelli has spent his life exploring these questions. He tells us how our understanding of reality has changed over the centuries and how physicists think about the structure of the universe today. In elegant and accessible prose, Rovelli takes us on a wondrous journey from Democritus to Albert Einstein, from Michael Faraday to gravitational waves, and from classical physics to his own work in quantum gravity. As he shows us how the idea of reality has evolved over time, Rovelli offers deeper explanations of the theories he introduced so concisely in Seven Brief Lessons on Physics. This book culminates in a lucid overview of quantum gravity, the field of research that explores the quantum nature of space and time, seeking to unify quantum mechanics and general relativity. Rovelli invites us to imagine a marvelous world where space breaks up into tiny grains, time disappears at the smallest scales, and black holes are waiting to explode--a vast universe still largely undiscovered.

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