Reality is Not What it Seems: The Journey to Quantum Gravity
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- Type：Epub+TxT+PDF+Mobi
- Create Date：2021-10-11 06:54:28
- Update Date：2025-09-06
- Status：finish
- Author：Carlo Rovelli
- ISBN：0141983213
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Summary
Do space and time truly exist？ What is reality made of？ Can we understand its deep texture？
Scientist Carlo Rovelli has spent his whole life exploring these questions and pushing the boundaries of what we know。 In this mind-expanding book， he shows how our understanding of reality has changed throughout centuries， from Democritus to loop quantum gravity。 Taking us on a wondrous journey， he invites us to imagine a whole new world where black holes are waiting to explode， spacetime is made up of grains， and infinity does not exist -- a vast universe still largely undiscovered。
Translated by Simon Carnell and Erica Segre。
Scientist Carlo Rovelli has spent his whole life exploring these questions and pushing the boundaries of what we know。 In this mind-expanding book， he shows how our understanding of reality has changed throughout centuries， from Democritus to loop quantum gravity。 Taking us on a wondrous journey， he invites us to imagine a whole new world where black holes are waiting to explode， spacetime is made up of grains， and infinity does not exist -- a vast universe still largely undiscovered。
Translated by Simon Carnell and Erica Segre。
Reviews
Hadi Bayat
，
خوش خوان با ترجمهای عالی: فیزیک جدید با نگاهی تاریخی به فیزیک همراه با نکته سنجی و بیان دقیق。 دست مترجم درد نکند که کتابی به این خوبی را ضایع نکرده و ترجمهای دقیق و شیوا ارائه کرده است。
Emmanouil
，
Ο Carlo Rovelli μέσα από μια επιτυχημένη ιστορική αναδρομή παρουσιάζει τη θεωρία της κβαντικής βαρύτητας βρόχων。 Με εμφανή ποιητική， φιλοσοφική και στοχαστική διάθεση ξεκινάει το ταξίδι από την αρχαία Ελλάδα με τον Δημόκριτο。 Στην συνέχεια μέσω του Γαλιλαίου και του Νεύτωνα φθάνει στις θεωρίες του Φαραντέι και του Μάξγουελ για να κάνει μια μεγάλη στάση στις θεωρίες της γενικής σχετικότητας και της κβαντομηχανικής。 Περιγράφει αναλυτικά την κβαντική βαρύτητα και στο τέλος εξηγεί πως η επιστήμη μπο Ο Carlo Rovelli μέσα από μια επιτυχημένη ιστορική αναδρομή παρουσιάζει τη θεωρία της κβαντικής βαρύτητας βρόχων。 Με εμφανή ποιητική， φιλοσοφική και στοχαστική διάθεση ξεκινάει το ταξίδι από την αρχαία Ελλάδα με τον Δημόκριτο。 Στην συνέχεια μέσω του Γαλιλαίου και του Νεύτωνα φθάνει στις θεωρίες του Φαραντέι και του Μάξγουελ για να κάνει μια μεγάλη στάση στις θεωρίες της γενικής σχετικότητας και της κβαντομηχανικής。 Περιγράφει αναλυτικά την κβαντική βαρύτητα και στο τέλος εξηγεί πως η επιστήμη μπορεί να βοηθήσει τον άνθρωπο να δεί το μυστήριο και την ομορφιά του κόσμου。 Η γραφή και η δομή του βιβλίου κάνει την ανάγνωση ελκυστική και ενδιαφέρουσα όχι μόνο για αυτούς που θέλουν να μάθουν για την κβαντική βαρύτητα αλλά και για όσους έχουν ήδη γνώσεις σχετικές με αυτήν。 。。。more
Andre Kramer
，
Last chapter a bit weak but meant to be speculative。
Varun Moka
，
Quantum physics is a kind of subject that we can not fully comprehend through our imagination。 And it becomes really difficult to understand something that we can not picturise， however difficult it is we need someone to simplify it and it can happen only through experimental results， that is the world we live in。 A few who understand this subject to the utmost are the ones who are expertise in physics and maths because there is a level that one has to reach in terms of understanding， intellectu Quantum physics is a kind of subject that we can not fully comprehend through our imagination。 And it becomes really difficult to understand something that we can not picturise， however difficult it is we need someone to simplify it and it can happen only through experimental results， that is the world we live in。 A few who understand this subject to the utmost are the ones who are expertise in physics and maths because there is a level that one has to reach in terms of understanding， intellectuality， and experience to comprehend the equations and maths involved in this to get a basic idea of what this 'quantum universe' is all about。 Unfortunately， We are very very very far away from that reality where quantum physics is just another thing。 To reach that reality we can only wait for another Newton or Einstein to pop up with a Mindblowing Eureka moment。 Whether it will happen or not， only time will decide （Ironically time is not even relevant when it comes to quantum physics） But， It is a book like this that can inspire the future X person to finally find the answers。 The author has done a brilliant job on this book。 Of course， you won't understand quantum mechanics just by reading a book on it that is written in words rather than equations but you do understand some of it。 What is more important is， it teaches you something you didn't know before in a simple manner， it is a step towards understanding one of the complex subjects in physics。 If you understand it， it inspires you to learn more about the subject。 It creates curiosity and that is what a brilliant book does。 。。。more
Ian
，
Quantum gravity understandably explained！
Holly Cruise
，
Not being a physicist， and therefore not understanding some parts of the physics discussed， hasn't stopped me enjoying books before （Rhodes， The Making Of The Atomic Bomb）， and the same is true here。 Carlo Rovelli wants to tell us about quantum loop theory but first we need to understand how physics got from the Ancient Greeks to CERN。Sure， there are bits which I reread several times before accepting that I just wasn't going to understand it all， but it didn't matter because a） the history bits Not being a physicist， and therefore not understanding some parts of the physics discussed， hasn't stopped me enjoying books before （Rhodes， The Making Of The Atomic Bomb）， and the same is true here。 Carlo Rovelli wants to tell us about quantum loop theory but first we need to understand how physics got from the Ancient Greeks to CERN。Sure， there are bits which I reread several times before accepting that I just wasn't going to understand it all， but it didn't matter because a） the history bits are all marvellously written and clear， and b） Rovelli， and translators Simon Carnell and Erica Segre， have such delightful turns of phrase。 The passage about light being delivered in photons not a continuous beam will stick with me forever because the evocative description of "grains of light" falling onto everything was just too beautiful。The book also contains discussion of one of my favourite topics， the end of the universe。 Can never read enough about that future-us problem TBH。 。。。more
David Coates
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Quantum loop gravity and the nature of reality - Profound。
Eliot Hanrio
，
What an wonderful piece。 As an audio book， it was so good I wanted to have to drive more to be able to listen to it more。 Carlo Rovelli manages brilliantly to take his readers to an understanding of the most impressive advancements in theorical physics， from ancien Ionan Greek philosophers to current age。 A must read。
Anthony Zemke
，
Writing this review from an existential void - I mean a granular quantised ethereal space-time field。Rovelli gives the following summary of his work: “The world revealed by quantum gravity is a new and strange one — still full of mystery， but coherent with its simple and clear beauty。 It is a world which does not exist in space and does not develop in time… A world without infinity， where the infinitely small does not exist， because there is a minimum scale to this teeming， beneath which there i Writing this review from an existential void - I mean a granular quantised ethereal space-time field。Rovelli gives the following summary of his work: “The world revealed by quantum gravity is a new and strange one — still full of mystery， but coherent with its simple and clear beauty。 It is a world which does not exist in space and does not develop in time… A world without infinity， where the infinitely small does not exist， because there is a minimum scale to this teeming， beneath which there is nothing。 Quanta of space mingle with the foam of spacetime， and the structure of things is born from reciprocal information which weaves the correlations between the regions of the world”This scientific primer brings physics alive and turns the theories of relativity and quantum mechanics into a coherent story。 A story which provokes the reader to delve deep into their conception of what reality really is — what is a beginning， what is up， what is down， what is time， what is empty space made of， what happened before the Big Bang， what is information — with simplicity and utmost clarity。Shot for the mind-**** Carlo！ 。。。more
Matt Mayevsky
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To moja druga książkę tego autora。 I po raz kolejny jestem pod wrażeniem jego talentu popularyzatorskiego。
Eline Claessen
，
I liked the book but the overly use of the scientists names sometimes made reading difficult
Zahra Al-Baker
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Initially， I was a bit apprehensive about reading this book over the fear of being unable to understand something。 However， as Rovelli states， this book is for people that are perhaps not the most knowledgeable about the topic， so I'm happy that I read this book。 （even if it was a bit difficult and exhausting at times to fully comprehend what was being said）Basically， Carlo Rovelli describes how Copernicus， Newton， Einstein and many others built upon pre-existing theories and found a way of comb Initially， I was a bit apprehensive about reading this book over the fear of being unable to understand something。 However， as Rovelli states， this book is for people that are perhaps not the most knowledgeable about the topic， so I'm happy that I read this book。 （even if it was a bit difficult and exhausting at times to fully comprehend what was being said）Basically， Carlo Rovelli describes how Copernicus， Newton， Einstein and many others built upon pre-existing theories and found a way of combining and rethinking these to improve the general picture we have of the world。 However， to further develop our understanding of the world， we need to be aware of our ignorance。 Being aware of our ignorance is at the heart of scientific thinking because to learn something， it is of the utmost importance to accept the fact that what we think we know may be completely wrong。With that being said， let's see what the future holds for quantum gravity。。。 。。。more
Craig Cooley
，
I am an engineer by training and understood much of what is in this book but must say there was much I did not understand。 The book is very well written and I enjoyed it immensely。 The subject matter， particularly towards the end of the book， can be tough sledding。 Nevertheless highly recommended to those who wish to understand the latest thinking in physics and their conception of the nature of reality。
Marijn Roos
，
Mensen met een natuurkundig brein zijn niet de doelgroep voor dit boek。 Mensen die niet van formules houden wel。 Ik ben doelgroep。 Mensen uit de doelgroep lezen dit soort boeken omdat ze hopen dat ze iets begrijpen van het mysterie dat hen omringt。 Het heelal dus。 Doelgroepmensen zijn eigenlijk op zoek naar het verhaal achter het ontstaan van het alles。 Ze willen andere mensen overtuigen。 Doelgroepers zijn in feite religieuzen op zoek naar een schriftgeleerde， een uitlegger。 Natuurkundigen zijn Mensen met een natuurkundig brein zijn niet de doelgroep voor dit boek。 Mensen die niet van formules houden wel。 Ik ben doelgroep。 Mensen uit de doelgroep lezen dit soort boeken omdat ze hopen dat ze iets begrijpen van het mysterie dat hen omringt。 Het heelal dus。 Doelgroepmensen zijn eigenlijk op zoek naar het verhaal achter het ontstaan van het alles。 Ze willen andere mensen overtuigen。 Doelgroepers zijn in feite religieuzen op zoek naar een schriftgeleerde， een uitlegger。 Natuurkundigen zijn de nieuwe engelen die in contact staan met god。Gelukkig ben ik alles wat mijn de ogen deed openen al weer vergeten。 Onwetend leef ik voort en onbenullig。 Want hoe interessant en ontroerend het geheel ook is， de schrijver is geneigd een halve fatwa uit te spreken over mensen die hem niet kunnen volgen of over mensen die hem niet geloven。 Wetenschap is alles， oerverhalen zijn nonsens。 Ik krijg een beetje last van de quants in mijn kop。 Of zijn de quants last？ 。。。more
Donald Heitland
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An informative introduction to loop quantum gravity merging quantum mechanics with general relativity to offer a picture of the fundamental structure of the physical world whose substance is seemingly a web of interacting quantum fields which generate space and time itself with waves， light and particles leading to the continuous cycles of life and death。
Sao Khue
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Might be my best read （or at least top 10） of 2021？
Dennis Leth
，
This is by far the best book I've read on the topic of quantum gravity。 Carlo Rovelli is a great teacher and uses all of human history and information to educate the reader。 The most difficult part of this book is the understanding of 'Time' as a fake/wrong denomination。The book is summed up by 2 great sections: We are always correlated with averages。 Averages behave like averages: they disperse heat and， intrinsically， generate time。 and Time is an effect of our overlooking of the physical mi This is by far the best book I've read on the topic of quantum gravity。 Carlo Rovelli is a great teacher and uses all of human history and information to educate the reader。 The most difficult part of this book is the understanding of 'Time' as a fake/wrong denomination。The book is summed up by 2 great sections: We are always correlated with averages。 Averages behave like averages: they disperse heat and， intrinsically， generate time。 and Time is an effect of our overlooking of the physical microstates of things。 Time is information we don't have。 Time is our ignorance。 The Mystery chapter （chapter 13） is a great chapter on what science is and isn't。 Science is NOT about certainties。 It's not about what we know and any scientist who proclaims to have the truth is by definition no longer a scientist。 We don't know what there is beyond the Big Bang; We don't know how a storm works， or a bacterium， or an eye - or the cells in our bodies， or our thought processes。 A scientist is someone who lives immersed in the awareness of our deep ignorance， in direct contact with our own innumerable limits， with the limits of our understanding。 I'm very pleased I got to read this book。 One of the great suggestions I have found in my news feed at this site and at my online book store。 Looking forward to taking a deep dive into my next experience with Carlo Rovelli's writing in "The order of time"。 。。。more
TonyR
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Brilliant ！ Interesting and thought provoking。 Fascinating expositions on the possible extent of ideas about science in the ancient world and how they link to contemporary thought
Stefan Gugler
，
Almost gave it a 4 despite the trite intro， but as the book ends in even more triteness， I really can't give it more than 3 stars。I understand that it's every physicist's hobby to look at the Greeks and talk about their ideas and how they relate to today。 Furthermore， no story can be complete without extensive discussion of the anni mirabilies and adjacent: Einstein， Bohr， Schrödinger， etc。 It's all good， and I get it， but I for myself find it extremely trite that none of these science populator Almost gave it a 4 despite the trite intro， but as the book ends in even more triteness， I really can't give it more than 3 stars。I understand that it's every physicist's hobby to look at the Greeks and talk about their ideas and how they relate to today。 Furthermore， no story can be complete without extensive discussion of the anni mirabilies and adjacent: Einstein， Bohr， Schrödinger， etc。 It's all good， and I get it， but I for myself find it extremely trite that none of these science populators ever came up with a different way to tell the story， be it Carroll， Tyson， Hawking， Sagan， Cox， Kaku， Deutsch， and all these men。 I see that Rovelli has studied Anaximander extensively， so maybe his opinions are more nuanced than presented in the book。 But the constant reminder of what people in antiquity already 'knew' was not only boring but worthy of a discussion， whether we can really call it knowledge， if you arrived at a correct conclusion without evidence or a certain structurality of theory。 But eh。At about 52% in， Rovelli claims that we are finally going to talk about quantum gravity for 'most of the book'， which is， in a way， already not possible。 But I have to say， apart from the very last bit of the book， what ensued was very good and new to me。 Rovelli explains well and it's obvious that he， as a world expert on LQG has thought a lot about what it all means。 I suppose it's just very specific criticism in regard to my own level of knowledge （as a PhD in quantum mechanics etc） but I feel even for amateurs that are interested in fundamental physics a different approach would work well。 In any case， these chapters were quite good。In the end， though， he fell back， parenthetically， into old physicist rambling of what science is and what it ought to be， a jab at postmodernism， a few pages against religion。 He strawmans the criticism of scientist， that they always act as if they knew everything， but simply asserting the opposite。 He doesn't even go finger-deep into real arguments and just puts a cherry on top at the end by salivating over how awesome the world is。 I mean， I get it， but it's just so done for me。If you've read literally any pop-sci account of physics， just jump to the chapter about quantum mechanics or even where quantum gravity starts。 。。。more
Patrick McComb
，
I read a lot of pop science books especially about physics and cosmology。 There are many ideas here that I have read about， but I have to say Carlo Rovelli might be the best writer of the group on these topics。 He does a great job intertwining the history and philosophy of science with advanced scientific discoveries and writes in a very concise yet artistic style。 Also， some of these "famous" physicists are often quite egotistical about their ideas， and while Rovelli does push some of his own i I read a lot of pop science books especially about physics and cosmology。 There are many ideas here that I have read about， but I have to say Carlo Rovelli might be the best writer of the group on these topics。 He does a great job intertwining the history and philosophy of science with advanced scientific discoveries and writes in a very concise yet artistic style。 Also， some of these "famous" physicists are often quite egotistical about their ideas， and while Rovelli does push some of his own ideas in this book he does so trying to show success of quantum gravity rather than disparage others。 Will read pretty much anything he writes。 。。。more
Fadia Elhaddad
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قرأت للكاتب كتابه الصغير ال حرفيا مالوش أي لازمةو قرأت ده كتاب تقيل جدا و بطئ جدا فيه الكثير من كثرة الكلام و الفلسفة ال مالهاش أي لازمة حرفيا كتاب يشوش العقل أكتر من أنه يفهمه الكاتب معرفش يوصل و يوضح أفكاره و ده يدل علي عجز و تقصير منه الكاتب ده هيقرأه أكاديمي دارس كل الكلام و فاهمه كويس ف مش هيواجه معاه مشكلة أما إذا كان أكاديمي مش فاهم ف الكتاب ده حرفيا هيتوهه أكتريعني أنا قرأت كتاب كان تقيل بالنسبة للبعض بس كان بسيط بالنسبالي لأن أنا فاهمة أصلاأما الكتاب ده كنت عاوزة أفهم و أعرف و أتعلم شيء قرأت للكاتب كتابه الصغير ال حرفيا مالوش أي لازمةو قرأت ده كتاب تقيل جدا و بطئ جدا فيه الكثير من كثرة الكلام و الفلسفة ال مالهاش أي لازمة حرفيا كتاب يشوش العقل أكتر من أنه يفهمه الكاتب معرفش يوصل و يوضح أفكاره و ده يدل علي عجز و تقصير منه الكاتب ده هيقرأه أكاديمي دارس كل الكلام و فاهمه كويس ف مش هيواجه معاه مشكلة أما إذا كان أكاديمي مش فاهم ف الكتاب ده حرفيا هيتوهه أكتريعني أنا قرأت كتاب كان تقيل بالنسبة للبعض بس كان بسيط بالنسبالي لأن أنا فاهمة أصلاأما الكتاب ده كنت عاوزة أفهم و أعرف و أتعلم شيء جديد إلا أني وجدتني في حالة من التخبطات المزعجةحتي المعضلات يا أما مكنش بيشرحها أو لو شرحها ميبسطهاشمعرفش ده كتاب هو حاطه لمين ولا بيتمنظر بنفسهو علي الرغم كان مفيد أكيد لأني فهمت أجزاء كبيرة منه يعني بنسية 75% و ده رقم كويس 。。。more
Mohammad
，
یک کتاب علمی خوب چه کتابی است؟ کتابی نیست که مفاهیم پیچیده و فرمولهای عجیب غریب و سخت داشته باشد؛ بلکه کتابی است که به سادهترین شکل ممکن بتواند این مفاهیم پیچیده را با فروتنی و عدم ادعا بیان کند。 دقیقا این چیزی است که کارلو رووِلّی آن را در این کتاب به کار برده است。"هدف علم این است که بفهمد جهان چگونه کار میکند، تصویری از جهان بسازد و آن را گسترش دهد و ساختاری مفهومی فراهم کند که از طریق آن بتوانیم به جهان بیاندیشیم。"تصویری که در این کتاب از جهان ارائه میشود از ابتدای اندیشهی انسان در فیزیک یک کتاب علمی خوب چه کتابی است؟ کتابی نیست که مفاهیم پیچیده و فرمولهای عجیب غریب و سخت داشته باشد؛ بلکه کتابی است که به سادهترین شکل ممکن بتواند این مفاهیم پیچیده را با فروتنی و عدم ادعا بیان کند。 دقیقا این چیزی است که کارلو رووِلّی آن را در این کتاب به کار برده است。"هدف علم این است که بفهمد جهان چگونه کار میکند، تصویری از جهان بسازد و آن را گسترش دهد و ساختاری مفهومی فراهم کند که از طریق آن بتوانیم به جهان بیاندیشیم。"تصویری که در این کتاب از جهان ارائه میشود از ابتدای اندیشهی انسان در فیزیک یعنی از آناکسیمندر و اتمهای دموکریتوس شروع میشود با گرانش نیوتن و میدانهای فارادی و ماکسول و نسبیتهای خاص و عام انیشتین ادامه مییابد تا در نهایت به تصویر زیبایی که مکانیک کوانتومی و گرانش کوانتومی از جهان نشان میدهند، ختم میشود。چه لذتی بالاتر از لذت یادگیری و فهمیدن؟"به نظر من تلاش برای بیشتر دیدن و پیش رفتن یکی از شکوهمندترین چیزهایی است که به زندگی معنا میدهد。 مانند عشق ورزیدن یا نگریستن به آسمان。 کنجکاوی برای یادگیری، برای کشف، برای سردرآوردن از پشت تپهی بعدی، میل به مزه کردن یک سیب، اینهاست که از ما انسان میسازد。 همانطور که اولیسِ دانته به همراهانش یادآور میشود، ما نه برای 《زندگی مانند حیوانات، که برای جستجوی فضیلت و دانش ساخته شدهایم》。 。。。more
Federica Colombo
，
“La realtà non è come ci appare” è un saggio di divulgazione scientifica di Carlo Rovelli， il quale ci accompagna in un viaggio che parte dalla Grecia antica， fino a giungere ai limiti della nostra attuale conoscenza。Il fulcro del libro è sicuramente la teoria della gravità quantistica a loop， nell’ambito della quale Rovelli è uno dei maggiori ricercatori， dalla quale si snodano nuove concezioni di tempo e spazio， molto diverse da quelle cui siamo abituati。Per giungere a questo punto focale però “La realtà non è come ci appare” è un saggio di divulgazione scientifica di Carlo Rovelli， il quale ci accompagna in un viaggio che parte dalla Grecia antica， fino a giungere ai limiti della nostra attuale conoscenza。Il fulcro del libro è sicuramente la teoria della gravità quantistica a loop， nell’ambito della quale Rovelli è uno dei maggiori ricercatori， dalla quale si snodano nuove concezioni di tempo e spazio， molto diverse da quelle cui siamo abituati。Per giungere a questo punto focale però， Rovelli parte da Anassimandro， Democrito， Zenone， passa dalla meccanica di Newton e dalla relatività ristretta e generale di Einstein， fino ad arrivare alla meccanica quantistica。 Insomma， ci propone un riassunto dei modi in cui l’uomo ha concepito spazio e tempo nel corso della storia。 Ho trovato questa parte abbastanza interessante， Rovelli è davvero un uomo molto acculturato， non solo nel proprio ambito di studi， ma sicuramente anche in ambito filosofico e letterario， tanto che cita persino Lucrezio e Dante。 Se avesse semplicemente scritto delle teorie di questi grandi fisici， probabilmente questa prima sezione sarebbe stata per me solo un ripasso， invece in questo modo è riuscito ad arricchirla e renderla a mio parere più unica （considerato che in qualunque libro in cui si tratti una teoria di gravità quantistica si riprendono sempre gli stessi concetti di base）。Dopodiché， si giunge al cuore del libro， appunto la teoria della gravità quantistica a loop （il motivo principale per cui ho deciso di affrontare questa lettura）: ho trovato la spiegazione molto chiara e Rovelli è riuscito sicuramente a convincermi di come questa teoria sia il connubio più semplice tra relatività generale e meccanica quantistica， poiché semplicemente ne unisce le proprietà fondamentali， in modo molto elegante。Considerato che ho letto questo libro subito dopo “L’universo elegante”， che invece tratta la teoria delle stringhe， posso dire che ho apprezzato di più il libro di Greene， poiché l’autore parla di aspetti anche molto profondi della teoria e riesce a renderli accessibili anche ad un lettore poco esperto; anche Rovelli non ha problemi di accessibilità， ma sicuramente sonda la teoria in modo più superficiale， senza entrare in dettagli tecnici spinosi ma che per me sarebbero stati interessanti。 Nonostante ciò， la teoria presentata da Rovelli mi è parsa molto più semplice a livello delle ipotesi da cui parte e del modo in cui le sue conseguenze si presentano in modo molto naturale。Rovelli prosegue poi parlando di possibili prove sperimentali （che ancora purtroppo sembrano lontane）， e dell’interpretazione che la nuova teoria dà di buchi neri e big bang。 Le conclusioni in fondo sono simili a quelle raggiunte con la teoria delle stringhe， poiché entrambe le teorie impongono che non esista nulla al di sotto della lunghezza di Planck。 Anche in questo caso le spiegazioni fornite da Greene erano molto più approfondite， però sono contenta di aver riscontrato delle somiglianze （per esempio il big bounce al posto del big bang）。Infine Rovelli propone un capitolo molto interessante sulla teoria dell’informazione e sulla termodinamica， giungendo all’evaporazione dei buchi neri， all’interpretazione della meccanica quantistica mediante questa teoria， e al concetto di tempo termico （anche qui， siamo ai limiti della conoscenza， Rovelli non smette mai di ricordarcelo， però la sua interpretazione mi è sembrata davvero razionale e convincente nonostante il contrasto con la concezione comune）。 Questo è stato senz’altro uno dei capitoli più interessanti， anche perché non avevo mai sentito parlare di teoria dell’informazione， dunque è stato un po’ ostico ma molto soddisfacente。Per concludere， voglio assolutamente consigliare questo libro perché è una lettura che merita l’attenzione: non darò cinque stelle proprio perché avrei gradito dell’approfondimento ulteriore， però la mancanza di approfondimento mi ha spinto a guardare video， cercare informazioni altrove， e anche questo è sempre importante per arricchire la propria conoscenza。 。。。more
Robert
，
OK， I give up because this is making me too angry。The errors are multitudinous， egregious and recognisable by any physics final year undergrad worth the name。 The final straw was the claim that "particles don't exist when they are not interacting。" This notion is an obvious breach of conservation of energy and not supported by quantum theory， which states that insofar as conservation laws can be breached at all， there is a time limit。 It's given by the famous Heisenberg Uncertainty Principle and OK， I give up because this is making me too angry。The errors are multitudinous， egregious and recognisable by any physics final year undergrad worth the name。 The final straw was the claim that "particles don't exist when they are not interacting。" This notion is an obvious breach of conservation of energy and not supported by quantum theory， which states that insofar as conservation laws can be breached at all， there is a time limit。 It's given by the famous Heisenberg Uncertainty Principle and put simply， it says that the more energy you want to "borrow" the less time you can do so for。 The energy of entire particles is large in this context - they can't cease to exist for long periods。 This is experimentally verified in accelerator experiments such as the Large Hadron Collider， where it's found that any time a particle emits another， or changes into one or more others， it takes a finite length of time - but a ridiculously short one。 （Different for different types of event， btw。）Anyway， I can't face any more of this right now; instead of pointing out every error and misconceptiion I'm just going to have to draw a line and say: DO NOT READ THIS BOOK: It's full of falsities and misleading bullshit。 。。。more
Alma
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Jos haluaa saada yleiskäsityksen maailmankaikkeuden rakenteesta ja koostumuksesta， ovat Carlo Rovellin Seitsemän lyhyttä luentoa fysiikasta sekä Todellisuus ei ole sitä miltä se näyttää kaltaisilleni maallikoille helposti lähestyttäviä opuksia （mainitussa järjestyksessä luettuina）。 Ajan luonne on sitten hyvä jatkoteos näille。 Kirjan erityinen ansio oli mielestäni siinä， miten teos kytkee nykyfysiikan maailmankuvan ja sen ajankohtaiset ongelmat osaksi vuosituhansien ajatteluperinnettä。 Teos palau Jos haluaa saada yleiskäsityksen maailmankaikkeuden rakenteesta ja koostumuksesta， ovat Carlo Rovellin Seitsemän lyhyttä luentoa fysiikasta sekä Todellisuus ei ole sitä miltä se näyttää kaltaisilleni maallikoille helposti lähestyttäviä opuksia （mainitussa järjestyksessä luettuina）。 Ajan luonne on sitten hyvä jatkoteos näille。 Kirjan erityinen ansio oli mielestäni siinä， miten teos kytkee nykyfysiikan maailmankuvan ja sen ajankohtaiset ongelmat osaksi vuosituhansien ajatteluperinnettä。 Teos palauttaa fysiikan kysymykset antiikin filosofian pohdintoihin todellisuuden olemuksesta。 Kirja käy näin kiinnostavasti läpi siinä esitetyn fysiikan historiallisen kehittymisen filosofiasta fysiikaksi。 Rovelli esittelee keskeiset nykyfysiikkaa edeltäneet ajattelijat， jotka ovat oivalluksillaan mahdollistaneet nykykäsitystämme maailman rakenteesta ja avaa hieman sitä， miten he tuloksiinsa päätyivät （usein hyvin kiinnostavien ja luovien ajatusprosessien kautta）。 Tämän lisäksi teos havainnollistaa nykyfysiikan todellisuuskäsitystä lukijalle ja yrittää selittää， mitä havainnot kertovat todellisuudesta， missä elämme。 Lopuksi Rovelli kuvailee joitakin tavoiteltavia pyrkimyksiä tulevaisuuden fyysikoille。Minulle kirja teki sen， mihin tietokirjat parhaimillaan kykenevät; se herätti kiinnostuksen ja innostuksen aihetta kohtaan。 Kirja oli enemmän kuin itse aiheensa。 Minulle kirja oli yhtä paljon kertomus ihmisen ajattelukapasiteetin laajuudesta sekä lukuisten ihmisten ponnisteluista kautta historian ymmärtää todellisuutta， kuin se oli kertomus suhteellisuusteoriasta ja kvanteista。 。。。more
Ana Martins
，
This is kinda physics poetry。 It is pretty， nice to read and you get a grasp of what he is talking about， but that is it。 It does not go deep on certain aspects as I would hope （like the loops， the existence or not of time and the special relativity）。Good to spend some time on the beach reading and I would have enjoyed it a lot 10 years ago， but I believe now it is just missing a detailed view over the subjects。
Kirollos Esa
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لم أحب دراسة الفيزياء النظرية، لكنى وعلى النقيض لا أشبع من القراءة عنهاكارلو روفيلى ممتع؛ فاق ستيفن هوكينج وميشو كاكو
Deyth Banger
，
Simple put in one place best stuff and easy to follow， to read。
Hanna （lapetiteboleyn）
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Carlos Rovelli offers a clear， fascinating look at the evolution of quantum physics。 Although baffling， it's also remarkably beautiful， and extraordinarily well written。 Carlos Rovelli offers a clear， fascinating look at the evolution of quantum physics。 Although baffling， it's also remarkably beautiful， and extraordinarily well written。 。。。more
Joshua Prince
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