Quantum: Einstein, Bohr and the Great Debate About the Nature of Reality by Manjit Kumar
(W.W. Norton, 2010, 448 pages)
What an intense, rich and satisfying read! It’s like eating a piece of dark chocolate cheesecake. You savor each bite slowly while appreciating the layers of the crust, the cheesecake and a chocolate mousse topping (if you are lucky!). That’s my experience of reading this book. I didn’t want the book to end. Manjit Kumar is a trained physicist and a writer with a matter-of-fact and engaging writing style. The amount of research Kumar did for this book was mind-boggling. Kumar draws on primary and second sources to piece together the history of the development of quantum theory. The book covers the personal lives of the most influential physicists in the early 20th century. It’s full of colorful characters and amazingly detailed stories. Although the book is centered on the great debate between Bohr and Einstein, Kumar features some not-so-famous scientists who made important contributions. I enjoyed these chapters too.
Kumar does a great job balancing biographical details of the scientists and brilliant interpretations of their ideas and achievements. Some of the science was over my head. It may require a basic understanding of differential equations and linear algebra. Still, I adored the book and appreciated the occasional humor. Ludwig Boltzmann was an Austrian physicist who made fundamental contributions to the kinetic theory of gases. Kumar describes him as “short and stout with an impressive late 19th-century beard,” and “a better physicist than a pianist.” I was surprised to find out that Erwin Planck, Former Undersecretary of State, a resistance fighter in the Third Reich, was the youngest son of Nobel Laureate Max Planck (the originator of the quantum theory). Erwin was one of the key plotters in 1944’s “20 July Plot,” an attempt to assassinate Adolf Hitler. Erwin was arrested and hanged in Berlin. Max Planck wrote: “He was a precious part of my being. He was my sunshine, my pride, my hope. No words can describe what I have lost with him.” Based on what I learned about Erwin Planck, I plan to watch the 2008 film “Valkyrie.” You may have heard a more popular story involving Einstein as a tobacco thief. Einstein’s doctor had banned him from buying any tobacco. Instead, Einstein often helped himself to Bohr’s tobacco pot. The story was quite funny. It’s on page 325, or you could Google the story.
This is a fun popular science read. If you are interested in the subject but want to read shorter books first, you may want to try Quantum Reality by Nick Herbert and In Search of Schrödinger’s Cat by John Gribbin.