Atomic & Nuclear Physics in The Books Store

In the following weeks, Serber touched on many themes, racing to an array of chalkboards to scribble complex formulas and equations. Among other things, he addressed how big a bomb would need to be in order to achieve critical mass--between 13.5 centimeters and 9 centimeters, he calculated--and what the probability of premature detonation might be. (It was, he concluded, always a danger.) At the end of the series, his lecture notes, classified as top secret, were gathered and printed for distribution to later cadres of scientists who came to work at Los Alamos. Years after the war they were declassified, and Serber, who died in May of 1997, took the opportunity to reflect on his work and the strange culture of the laboratory, adding postscripts and other commentary reproduced in the present edition.

By the time the story reaches Oppenheimer's fateful Manhattan Project work, readers have been swept along much as the project's young physicists were by fate and enormous pressure. The authors allow the scientists to speak for themselves about their reactions to the Hiroshima and Nagasaki bombings, avoiding any sort of preacherly tone while revealing the utter, horrible ambiguity of the situation. For instance, Oppenheimer wrote in a letter to a friend, "The thing had to be done," then, "Circumstances are heavy with misgiving."

Many biographies of Oppenheimer end here, with the seeds of his later pacifism sown and the dangers of mixing science with politics clearly outlined. But Bird and Sherwin devote the second half of this hefty book to what happened to Oppenheimer after the bomb. For a short time, he was lionized as the ultimate patriot by a victorious nation, but things soured as the Cold War crept forward and anti-communist witchhunts focused paranoia and anti-Semitism onto Oppenheimer, destroying his career and disillusioning him about his life's work. Devastated by the atom bomb's legacy of fear, he became a vocal and passionate opponent of the Strangelovian madness that gripped the world because of the weapons he helped develop.

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.