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# QED: de zonderlinge theorie van licht en materie

This book is a venture that, as far as we know, has never been tried. It is a straightforward, honest explanation of a rather difficult subject-the theory of Quantum electrodynamics-for a nontechnical audience. It is designed to give the interested reader an appreciation for the kind of thinking that physicists have resorted to in order to explain how Nature behaves.

Paperback, 134 pages

Published
1989
(first published 1985)

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## Community Reviews

(showing 1-30)

*really*is. Really, it's a love letter to a dead woman. Feynman says in his introduction that his friend Alix Mautner had always wanted him to explain quantum electrodynamics to her so that she could understand it, and he'd never gotten around to doing that. Now it was too late. But, somehow, you can see that that only made him want to do it, n ...more

I love this area of physics and I think it’s wonderful: it is called quantum electrodynamics, or QED for short.

I love this book and I think it’s wonderful: it is called

*QED: The Strange Theory of Light and Matter*, or

*QED*for short.

I feel as though I’ve been searching for this book for a long time, and now I’ve finally found it. In scarcely 150 pages, Feynman takes you inside the logic of this famously obscure subject. What was before unintelligible is breezy in Feynman’s hands. What had befor ...more

I took this photo when I was about half way through the book. It shows a picture of a CD [click to enlarge]. It's been illuminated by an ordinary office lamp and the flashlight from my camera. I knew about this "rainbow" effect for a long time, but I didn't know exactly

*how*it is created. This book gives some answers.

To write a successful book like

*QED*(short for Quantum Electro-Dynamics) two prerequisites are required: 1) The author must know a great deal about the subject matter, and 2) He mu ...more

*QED: The Strange Theory of Light and Matter*is an outstanding book on a subject that is often overlooked or glossed-over in many popular physics books. Feynman does a deep dive on Quantum Electrodynamics: a theory that deals not only with the various interactions between light and matter, but which can be applied to every area of physics with the exception of gravitation and nuclear physics.

The theory of QED is fascinating, both in its explanatory power and its elegance. Using only a handful of ...more

Ce livre propose de vulgariser la théorie scientifique la plus exacte dont nous disposons avec laquelle il est possible de modéliser la lumière, la matière et leurs interactions réciproques, à savoir la mécanique quantique. Développée au cours du siècle précédent, elle se fonde sur des principes qui brusquent le sens commun, comme la dualité onde-corpuscule ou le principe de superposition, car il n'est plus possible de s'aider d'analogies à partir de notre expérience pour en rendre compte sans p ...more

Jan 24, 2010
Joshua Nomen-Mutatio
rated it
it was amazing
·
review of another edition

Shelves:
physics

It's all arrows, man. All about arrows. Physics is not a subject I have a terribly good grasp on mainly because my eyes glaze over at the sight of advanced mathematical equations, however Feynman is a pretty great at making the complex subjects of particle physics and quantum mechanics intelligible to the layest of laypersons. Fortunately I also read this with able-minded people who translated the math into clearer ideas which of course opened things up to broader philosophical speculation--some
...more

He uses arrows to represent complex numbers in complex plane,with its modules and phases and uses sums and products of histories in the propagation of the photon ...more

The book is transcription of a few lectures Feynman gave on Quantum Electrodynamics (QED), a branch of quantum theory he and Dirac developed. Feynman introduces a few simple rules on how electrons and photons behave (which appear to be easy-to-digest analogs for vector calculus) and then off he goes, explaining the theory a ...more

Mar 04, 2012
Remo
rated it
it was amazing
·
review of another edition

Shelves:
divulgacion-cientifica,
2007

Esta es una de las muchas incursiones que hizo el gran Feynman en el terreno de la divulgación científica. En realidad él no escribió ninguno de sus libros de divulgación científica, sino que se adaptaron de sus ciclos de conferencias de divulgación, que, ahí sí, Feynman preparaba a conciencia. Este libro surge de una serie de cuatro conferencias que dio Feynman en UCLA (que en inglés no se dice ucla sino u-c-l-a, *iusielei*, dato CPI para viajeros por tierras californianas).

...more

Dec 28, 2014
Mary-Jean Harris
rated it
it was amazing
·
review of another edition

Shelves:
esoteric-philosophy-or-science

This book hits all the marks for a great novel. Yes, it's a science book, but it's probably one of the best ones I've read so far. Feynman has a fun style of writing and makes these topics very easy to understand. He really captures the wonder and excitement that new things in physics can offer. Even though I knew many of the things in the book already, I had never seen them presented in this way before, as in, explaining common phenomena like reflection and diffraction with the little "arrows"
...more

Feynman uses light’s refraction to illustrate the relationship between electrons and photons. To under ...more

Feynman is confident and flamboyant in his style, which is easy and enjoyable to read. He also seems exceptionally able to put himself into the mind of a non-expert and explain things appropriately.

The book is based on 4 lectures explaining some ...more

Apr 20, 2015
Siina
rated it
it was amazing
·
review of another edition

Shelves:
non-fiction,
science

I first read Ottaviani's biographical comic of Richard P. Feynman and that is how I got interested in quantum electrodynamics. I'm not really good when it comes to physics (I do love math), but light and lenses I have understood and enjoyed always. Thus getting my hands on this book was wonderful!

Feynman explains quantum electrodynamics very clearly with a humorous twist. The book is logical and very well written altogether. The last chapter is the only somewhat hard part, since in that one Feyn ...more

Feynman explains quantum electrodynamics very clearly with a humorous twist. The book is logical and very well written altogether. The last chapter is the only somewhat hard part, since in that one Feyn ...more

I feel like I really understood something... maybe that's because I'm a physicist and I know some of these things, but nevertheless I think Feynman explained everything so clearly that a layman could ...more

I had encountered with quantum physics several times in previous books and every writer talking about how hard it is, and it turned out that they are absolutely right. I know that because I read the book very slowly and later on I even skipped some parts of the book.

Nature is simple and very perplexing at the same time; And as Feynman said "You see my physics students don't understand it... Tha ...more

Alas, that's the nature of science popularization. If you omit math, the heart is gone, and you have to make do with the leftover shell. Feynman does the best job of leaving behind some substance that I've ever seen in such a book.

Excellent pedagogy, and some great q ...more

Ho approcciato questa lettura dopo aver osservato che vari autori (C.J.S. Clark, S. Hameroff and R. Penrose, H. Stapp, D. Bilodeau, W. Seager) utilizzano il funzionamento della meccanica quantistica per spiegare il funzionamento della coscienza, e senza dubbio spesso in maniera estremamente speculativa.

Feynman rico ...more

I don't think I would recommend this book for anyone that doesn't have a basic understanding of both classical mechanics and quantum mechanics.

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Richard Phillips Feynman was an American physicist known for the path integral formulation of quantum mechanics, the theory of quantum electrodynamics and the physics of the superfluidity of supercooled liquid helium, as well as work in particle physics (he proposed the parton model). For his contributions to the development of quantum electrodynamics, Feynman was a joint recipient of the Nobel Pr
...more

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“What I am going to tell you about is what we teach our physics students in the third or fourth year of graduate school... It is my task to convince you not to turn away because you don't understand it. You see my physics students don't understand it... That is because I don't understand it. Nobody does.”
—
230 likes

“There is a most profound and beautiful question associated with the observed coupling constant, e - the amplitude for a real electron to emit or absorb a real photon. It is a simple number that has been experimentally determined to be close to 0.08542455. (My physicist friends won't recognize this number, because they like to remember it as the inverse of its square: about 137.03597 with about an uncertainty of about 2 in the last decimal place. It has been a mystery ever since it was discovered more than fifty years ago, and all good theoretical physicists put this number up on their wall and worry about it.) Immediately you would like to know where this number for a coupling comes from: is it related to pi or perhaps to the base of natural logarithms? Nobody knows. It's one of the greatest damn mysteries of physics: a magic number that comes to us with no understanding by man. You might say the "hand of God" wrote that number, and "we don't know how He pushed his pencil." We know what kind of a dance to do experimentally to measure this number very accurately, but we don't know what kind of dance to do on the computer to make this number come out, without putting it in secretly!”
—
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I would love to read the rest of your review. Is it anywhere accessible?

Oct 19, 2015 04:40AM

Manny wrote: "The full review appears in my collection What Pooh Might Have Said to Dante"I this always the case when there is the "The rest of this r ...more

Nov 26, 2015 01:16AM