{pdf} Reality Is Not What It Seems: The Journey to Quantum GravityAuthor Carlo Rovelli – Carcier.co

It s been wonderful to gain this insight into the nature of reality and space time I m continually humbled by the intelligence of people like Rovelli I ve read other books on the subject and similar, and I have found this to be the best. It was a great walk through history, from the Greeks at Miletus, to the present day search for what is gravity This walk through history is valuable, because it shows how scientific knowledge develops, and how hypotheses are subsequently validated through experiment, or shown to be unhelpful It also shows how people depend on their predecessors work to make progress, and refine knowledge At each stage in the process, theories produce something which gives a basis for practical developments A future scientist then refines that nderstanding, which may reveal anomalies in the previous theory, or description of the world This doesn t negate the previous work, but adds to understanding, and may then allow the development of new practical applications It s a great little book, and easy to follow, even though the few mathematical formulae quoted will be a foreign language for most people. This is a must read for anyone interested in physics and the scientific endeavour Carlo Rovelli has produced a much needed understandable guide to modern physics and its relevance to today He takes us on a journey of extraordinary achievement starting from the Greeks to the most recent research How is it that we can know all these things about the world and universe that we live in There are often simple truths behind the complexity An excellent book. This book starts off by going back to the ancient Greeks I think this is a mistake Nobody wanting to read about Quantum Gravity is interested in the ideas of the ancient Greeks At times it s obvious that it has been translated from Italian It s only a thin book but by half way through I was bored with it. I like Carlo Rovelli s writing, so I m a bit biased to start with However, in my defense he does write extremely well and conveys difficult concepts with startling clarity In this book Carlo takes us on the journey to Quantum Loop Gravity, a concept which attempts to join General Relativity with Quantum Electrodynamics, without anybody disappearing in a puff of purple smoke leaving nothing but their boots It isn t entirely successful Starting with the Greeks we look and some general philosophical aspects so everybody is nicely grounded in 2,000 years ago, and nothing much changes until Newton At this point everybody is happy, nice deterministic universe, off to church on Sundays in the sure knowledge it won t make any difference Then along came Max Planck, Schr dinger him of the missing pet cat and Heisenberg, this little gang of trouble makers caused a lot of uncertainty But after a while a bunch of clever people, notably Julian Schwinger, Richard Feynman and Freeman Dyson, nothing to do with vacuum cleaners , had a good look and decided we could explain almost everything by looking at the interaction of fields Carlo runs with this idea, going to back to the by now rather simplistic ideas of Newton to be fair, he saw the elephant in the room and measured it s gravitational force and begins to put forward an idea of how these fields could explain gravity without the universe doing a credible impersonation of an Ouzelum bird The end of the book is quite complicated, but well worth it for the simple reason you are still reading at that point Also, as a history of physics in a nutshell, it shines for it s brevity but without loosing important detail Every paragraph is worth reading twice I digress It s a damn good read, worth bunging a few groats Carlos way, you won t be sorry That good enough Rovelli has a way of knocking your socks off and seeing the universe in a whole new light I read quite a few popular science books but none make me feel as consistently amazed as this guy. Scientists strive to unlock our understanding of the world Rovelli steers us through a complex reality to understand the information contained in fields Controversial and thought provoking TELEGRAPH And OBSERVER BOOKS OF THE YEAR A Global Superstar Professor Rovelli Is Making The Grammar Of The Universe Accessible To A New Generation Channel News From The Bestselling Author Of Seven Brief Lessons On Physics Comes A New Book About The Mind Bending Nature Of The UniverseDo 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 UndiscoveredTranslated By Simon Carnell And Erica Segre