Free PDF QED: The Strange Theory of Light and Matter
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QED: The Strange Theory of Light and Matter
Free PDF QED: The Strange Theory of Light and Matter
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Review
"Physics Nobelist Feynman simply cannot help being original. In this quirky, fascinating book, he explains to laymen the quantum theory of light, a theory to which he made decisive contributions." (The New Yorker)"Feynman's lectures must have been marvelous and they have been turned into an equally entrancing book, a vivid introduction to QED which is leavened and enlivened by his wit. Anyone with a curiosity about physics today should buy it, not only to get to grips with the deepest meaning of quantum theory but to possess a slice of history."---Pedro Waloschek, Nature
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Product details
Series: Princeton Science Library
Paperback: 176 pages
Publisher: Princeton University Press; New Ed edition (October 1, 1988)
Language: English
ISBN-10: 0691024170
ISBN-13: 978-0691024172
Product Dimensions:
8.4 x 5.5 x 0.5 inches
Shipping Weight: 2.4 ounces
Average Customer Review:
4.5 out of 5 stars
311 customer reviews
Amazon Best Sellers Rank:
#166,356 in Books (See Top 100 in Books)
I very much enjoyed reading the book, probably because I appreciate Richard Feynman's writing style. He was a brilliant Physicist, and Nobel Prize Winner in Physics. However, I have issues with Quantum Physics. I am a retired nuclear physicist, and somehow Quantum physics reduces the entire universe to *PROBABILITIES.* II will not go into specifics, which would put everyone to sleep, but I personally prefer Relativity to explain the Universe. One small example: Quantum theory maintains that Any Moment, OR Instant -- Like --NOW -- is that exact moment throughout the Universe. Relativity maintains that TIME slows down near a large gravity well such as a star, like our sun, and as any mass approaches the speed of light, ALSO, the Mass Increases at these great speeds, thus there cannot be a Universal 'NOW instant.'
Richard Phillips Feynman - what more can I say about this guy that hasn't been said already through the years? Feynman was an incredibly original physicist (fellow Nobel laureate Julian Schwinger called him someone who marched to his beat) who dazzled and impressed not only his esteemed peers but also managed to carve himself a special place in the public eye.Feynman is that unique and rare breed of scientist who can successfully explain very complicated ideas in simple terms so non-scientists (or scientists not in his field) can understand. He uses his own brand of metaphors and analogies to clarify quantum mechanics, and QED is the perfect example of that.In just four lectures (delivered, incidentally, at my alma mater UCLA in the 1980's), Feynman distills the essence of Quantum Electrodynamics without assuming any prior math or physics background in his audience. He doesn't use any calculus, any abstract algebra, heck he doesn't even mention complex numbers once! Incredible! QED has been hailed as the most precise scientific theory ever constructed because its predictions have been confirmed by so many experiments throughout the last half of 20th century. It reconciles the many discrepancies between the 'classical' version of electromagnetism and quantum mechanics and successfully explains many other anomalies seen in nature. Feynman shared the Nobel in physics (with Schwinger and Tomonaga) for playing a key role in developing the theory.Using simple arrows and basic operations like 'shrinking' and 'turning' arrows, Feynman explains phenomena such as reflection by mirror, partial reflection by glass, absorption by opaque materials, the apparent slowing of light as it goes through water and other media etc. All through the lectures he maintains a light tone and makes several self-deprecating jokes about the way physicists name things (he reserves particular scorn and derision for the naming of quarks).As a medical/graduate student in neuroscience but with some math and physics background (but not enough to actually understand renormalization and gauge theories), I really appreciated Feynman's ability to explain QED so effectively without ever sounding condescending (which a lot of physicists are unfortunately too prone to do).This your chance to read one of 20th century's most influential physicist break down one of the most fundamental theories of physics with great style and elegance.
In the introduction, it is suggested that you slowly reread paragraphs to be sure you understand them. Good advice; QED is not something intuitively easy to understand, even though the explanations are presented with a minimum number of formulas and scientific jargon.Another reivewer pointed out that this book is good because it is short. I agree; even if you don't understand it all on the first read, it isn't a major commitment to read it a second or third time.A good teacher makes you feel smart and confident enough in your newly acquired knowledge to share it with others. Even though I couldn't pass even a basic test on QED, I did learn several interesting things about light that I can explain in casual conversation and even demonstrate. Share what you've learned with your children. This is interesting enough that you might inspire him or her to become a physicist.
So this is what physicists do. They observe light and make mathematical formulas based on the observations of the behavior of it. This is how physicists see the world. Tiny particles bouncing this way and that, sometimes in predictable ways. This is as simple an explanation of photons that I have ever read. It is all clearly explained and the math isn't too difficult. I wonder of the utility of this formulation? I will never set up experiments such as these, so I will never be able to test the theory presented here. But it is interesting to see how physicists see the world. Or at least the tiny proportion of the world that they do observe.
In this age of new discoveries in fundamental physics he is sorely missed. The book is compelling not because he is a great explainer but because he seems to fundamentally understand more clearly. So he has no fear in describing the limits of theories or knowledge - many popularizers are not true scientists and it is tricky for them to tell the difference between their own limits and the actual limits of the theories. - to reveal that there is *no* physical intuition at the quantum level - just laws. And we want those laws to be as elegant and simple and true to experiment as possible.
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