Saturday, December 9, 2017

David N. Schwartz's "The Last Man Who Knew Everything"

David N. Schwartz holds a PhD in political science from MIT. He has worked at the State Department Bureau of Politico-Military Affairs, and at Goldman Sachs in a variety of roles in both London and New York. He lives in New York with his wife, Susan. His father, Melvin Schwartz, shared the Nobel Prize for Physics in 1988.

He applied the “Page 99 Test” to his latest book, The Last Man Who Knew Everything: The Life and Times of Enrico Fermi, Father of the Nuclear Age, and reported the following:
Page 99 of The Last Man Who Knew Everything provides background on one of Enrico Fermi's most important contributions, his theory of beta decay. In order to develop this theory, he needed first to understand Dirac's brilliant but extremely difficult theory of quantum electrodynamics and quantum field theory. Fermi, in typical fashion, decided that he needed to teach it to others in order to fully understand it himself. In the process he came up with an approach that was pedagogically superior to Dirac's - so much so that in later years Hans Bethe and Eugene Wigner both said that they learned quantum field theory from the paper Fermi wrote on the subject.

Fermi went on to use quantum field theory to explain beta decay, a radioactive process in which neutrons in the atomic nucleus become protons (or vice versa). At the same time, electrons and neutrinos are created and emitted at high speeds. The interaction that resulted in beta decay was for many years called the Fermi interaction. Today it is more commonly called the weak interaction because it is so weak that it occurs only when the particles in the nucleus are extremely close to each other. His beta decay theory kicked off some fifty years of intensive research including the realization that the weak interaction was closely linked to the electromagnetic interaction; the discovery of three types of neutrinos; and the discovery of the Higgs boson.

The theory of beta decay was classic Fermi: a radical simplification of a complex theoretical concept developed by teaching it to others, which he then proceeded to use to solve a seemingly unrelated problem.

My hope is that by page 99 the reader realizes that this book is for the non-scientist - that the explanation of the science is intended for the reader with little or no background in physics. I have tried on every page to present the material as simply and clearly as possible without dumbing it down. Fermi had an absolute conviction that anyone could understand physics and this conviction inspired the way I presented the material myself.
Visit David N. Schwartz's website.

--Marshal Zeringue