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141 of 142 people found the following review helpful:
5.0 out of 5 stars
Enigma - QED and Feynman are Outside Normal Experience, June 23, 2000
Enigma - this term best describes QED, the notoriously non-intuitive basis of fundamental physics. But 'enigma" equally applies to this book, QED. Why is it so popular? Four lectures on quantum electrodynamics? Why would anyone, other than a physicist, rave about such a book?Feynman cautions the audience that they may not understand what he will be saying. Not because of technical difficulty, but because they may be unable to believe it, unable to accept what he is saying. "The theory of quantum electrodynamics describes Nature as absurd from the point of view of common sense. And it fully agrees with experiment. So I hope you can accept Nature as She is - absurd." I long had this problem. I wanted to understand why, in addition to how nature works. I wanted some philosophical understanding, some underlying meaning. I have come to accept that the fundamental laws (rules, behavior, whatever) of physics are not intuitive, but are incomprehensible in terms of common sense. To appreciate Feynman's QED lectures, you must have patience, some commitment (its not really difficult), but more than anything else you need a willingness to set aside disbelief and simply listen to a physicist talk about quantum electrodynamics. A willingness to accept that nature refuses to be understood. Analyzed, dissected, mathematically described (in a probabilistic sense), but not fundamentally understood. QED. I am largely unsatisfied by books for laymen on quantum physics, string theory, cosmology, and the like. My background includes some physics and I find that a bit of mathematics is more helpful than a great many analogies, no matter how cleverly constructed. QED should have been disappointing. But I gave it five stars. Feynman did not rely on analogies. He talks physics and experiments. Feynman had a wonderful clarity of thought, an ability to explain advanced physics, and all with a sense of humor. No math symbols, no complex numbers, no matrices, no wave mechanics, no advanced probability analysis - just simple addition of little arrows that shrink and turn. Feynman was unpredictable. He saw the world in unexpected ways. In a footnote he mentions that Heisenberg's uncertainty principle is really no longer a necessary construct. "If you can get rid of all the old-fashioned ideas and instead use the ideas that I am explaining in these lectures - adding arrows for all the ways an event can happen - there is no need for an uncertainty principle." Heisenberg relegated to a footnote! The casual reader may find some short sections a bit strenuous, particularly some of the more involved manipulations of arrows, but stay with it. As Feynman points out in the preface, these lectures represent physics accurately without distortions for simplicity. Nothing would need to be unlearned if you later majored in physics. Think about it. QED may lead you down a path heretofore not taken.
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by Richard P. Feynman
