[ ^Top ]

Product Description

Famous the world over for the creative brilliance of his insights into the physical world, Nobel Prize-winning physicist Richard Feynman also possessed an extraordinary talent for explaining difficult concepts to the nonscientist. QED--the edited version of four lectures on quantum electrodynamics that Feynman gave to the general public at UCLA as part of the Alix G. Mautner Memorial Lecture series--is perhaps the best example of his ability to communicate both the substance and the spirit of science to the layperson.

The focus, as the title suggests, is quantum electrodynamics (QED), the part of the quantum theory of fields that describes the interactions of the quanta of the electromagnetic field-light, X rays, gamma rays--with matter and those of charged particles with one another. By extending the formalism developed by Dirac in 1933, which related quantum and classical descriptions of the motion of particles, Feynman revolutionized the quantum mechanical understanding of the nature of particles and waves. And, by incorporating his own readily visualizable formulation of quantum mechanics, Feynman created a diagrammatic version of QED that made calculations much simpler and also provided visual insights into the mechanisms of quantum electrodynamic processes.

In this book, using everyday language, spatial concepts, visualizations, and his renowned "Feynman diagrams" instead of advanced mathematics, Feynman successfully provides a definitive introduction to QED for a lay readership without any distortion of the basic science. Characterized by Feynman's famously original clarity and humor, this popular book on QED has not been equaled since its publication.

[ ^Top ]

Another excellent book by Feynman        Rating:

To me Feynman is right up there with Albert Einstein. I love is fearlessness and is desire to see the truth. The Buddha and Feynman are probably enjoying a good laugh. I recommend his other book " What do you care what other people think".

The truth about charged quanta!        Rating:

This is the shortest book about quantum electrodynamics I've ever read, but it is still full of profound revelations (for instance, electrical charge is really nothing more than the square root of the probability that an electron will couple to a photon, etc)...

It takes a genius to make it simple        Rating:

Feynman picks the thing that is simplest in the quantum world, a single particle, and explains it using no math. Instead of equations, the quantum theory in this book consists entirely of pictures. But this is not a popularization in the usual sense. This is not gossip about science. This actually is quantum theory in a very simple case. For anyone who wants to know how the universe is put together, this is an astonishing mind opener.

Mind-blowing        Rating:

Feynman makes it easy for the curious amateur to understand. This book is accessible and mind-blowing. Everyone should read it. And there is little if any math so don't be intimidated.

Just the facts, Ma'am        Rating:

In the Introduction to the 'Strange Theory of Light and Matter' Feynman tells us that what he likes to talk about is the "part of physics that is known, rather than a part that is unknown." And he goes on to give us a thumbnail sketch, a "physicist's history of physics," which shows how physicist's, in their quest to describe the world, continually reduce a group of seemingly unrelated phenomenon to a single phenomenon. So heat and sound were found, thanks to Newton, to be reducible to laws of motion, while electricity, magnetism and light were reducible to Maxwell's electromagnetic wave. In this way physicist's explain the world.

Here one is almost tempted to say that they proceed much as religion and ideology do. Religion has from the beginning of recorded history been taking phenomenon and feelings, like storms and suffering or aging and despair, and molding them into an internally coherent explanation of all that is and was and will be. They do this by separating the relevant from the incidental, then uncovering the essential by excluding the accidental. They simplify. In similar ways ideologues like the communists take what at one time were discreet incidents and disparate facts (for instance, the poverty of the third world and imperialism) and weave them into a grand general explanation. Is science merely the latest avatar of religion? - Or perhaps it is an ideology without tears?

Not so fast! Feynman goes on to show us that attempts to explain the atomic world foundered on the laws of motion. He shows us that the rescue of those shipwrecked on the shoals of classical theory involved the invention of a new, counter-intuitive theory, Quantum Mechanics. He then goes on, while discussing a small portion of that theory, to give us the (deliberately) hilarious and 'absurd' example of how physicists predict how many photons, out of a given number, will be reflected back from a surface. 'Draw little arrows on a piece of paper' and watch the clock, he tells us. And with no explanation as to why this procedure works! Of course, for physics, what matters is that it does work. Physicists have been forced "away from making absolute predictions to merely calculating the probability of an event." But where is the essential, the eternal, the necessary?

Perhaps this is what Feynman is driving at. Science describes, it doesn't explain why. We should all wonder at that. The great 'philosophical' questions that drive theology and political ideology are beyond the purview of physics. Science doesn't create worlds; nor does it 'interpret' or change them, it simply describes what it finds. (It is technology that changes the world.) Freud saw fit to end one of his books by saying that 'our science is no illusion, but it would be an illusion to believe you can find elsewhere what it does not offer.' But how much truer this is of physics! One is then perhaps not surprised to come away from this little book wondering exactly what the status of philosophy, psychoanalysis, politics and religion would be in a genuinely scientific world.

But of course there will never be, given human irrationality, an entirely scientific human culture. This book is a superb introduction to quantum electrodynamics. It's 'experimentalism' and agnosticism towards grand philosophical explanations I found very congenial and convincing. Feynman is an engaging personality and this is an entertaining book. While one doesn't need a degree in physics and math to understand him a lay competence and interest in math and physics is certainly necessary. For those of us still living in a Newtonian world, a dwindling number to be sure, this book will have several surprising moments. But that really is part of the show!

[ ^Top ]