An ambitious explanation of the vast quantum universe aimed at readers willing to work.
Quantum physics describes how everything (not just subatomic particles) works, but even experts agree that no one truly understands it.
There is no shortage of popular introductions, but curious readers will not regret choosing this meticulous account by British physicists Cox and Forshaw (Why Does E=mc2? (And Why Should We Care?), 2009). A particle can also be a wave of pure energy, and it can be anywhere in the universe at the same time. An electron moves from one orbit of an atom to another instantly, but one can never locate it precisely. Space cannot be empty; matter constantly appears and vanishes. If quantum laws do not forbid something from happening, it will eventually happen. These are facts; experiments confirm them. Writers often explain these in relentlessly nontechnical language that converts them into a magic show, but Cox and Forshaw will have none of this. Using ingenious pedagogical examples, they demonstrate that weird quantum phenomena make perfect sense. Thus, they convert a particle/wave to a clock whose time indicates the wave’s phase and whose hands turn counter-clockwise as the particle/wave moves; the square of the hand’s length represents the probability of finding it in a particular spot. By following this analogy, they insist, formerly mysterious concepts such as wave-particle duality and the uncertainty principle follow naturally. While the authors show real imagination, they are dealing with profoundly challenging subjects, and readers who do not pay close attention will find themselves reduced to enjoying the traditional magic show.
An ambitious explanation of the vast quantum universe aimed at readers willing to work.Pub Date: Feb. 15, 2012
ISBN: 978-0-306-81964-3
Page Count: 256
Publisher: Da Capo
Review Posted Online: Jan. 8, 2012
Kirkus Reviews Issue: Jan. 15, 2012
An intriguing meditation on the nature of the universe and our attempts to understand it that should appeal to both...
Italian theoretical physicist Rovelli (General Relativity: The Most Beautiful of Theories, 2015, etc.) shares his thoughts on the broader scientific and philosophical implications of the great revolution that has taken place over the past century.
These seven lessons, which first appeared as articles in the Sunday supplement of the Italian newspaper Sole 24 Ore, are addressed to readers with little knowledge of physics. In less than 100 pages, the author, who teaches physics in both France and the United States, cogently covers the great accomplishments of the past and the open questions still baffling physicists today. In the first lesson, he focuses on Einstein's theory of general relativity. He describes Einstein's recognition that gravity "is not diffused through space [but] is that space itself" as "a stroke of pure genius." In the second lesson, Rovelli deals with the puzzling features of quantum physics that challenge our picture of reality. In the remaining sections, the author introduces the constant fluctuations of atoms, the granular nature of space, and more. "It is hardly surprising that there are more things in heaven and earth, dear reader, than have been dreamed of in our philosophy—or in our physics,” he writes. Rovelli also discusses the issues raised in loop quantum gravity, a theory that he co-developed. These issues lead to his extraordinary claim that the passage of time is not fundamental but rather derived from the granular nature of space. The author suggests that there have been two separate pathways throughout human history: mythology and the accumulation of knowledge through observation. He believes that scientists today share the same curiosity about nature exhibited by early man.
An intriguing meditation on the nature of the universe and our attempts to understand it that should appeal to both scientists and general readers.Pub Date: March 1, 2016
ISBN: 978-0-399-18441-3
Page Count: 96
Publisher: Riverhead
Review Posted Online: Dec. 7, 2015
Kirkus Reviews Issue: Dec. 15, 2015
BOOK REVIEW
BOOK REVIEW
As much a work of philosophy as of physics and full of insights for readers willing to work hard.
Undeterred by a subject difficult to pin down, Italian theoretical physicist Rovelli (Reality Is Not What It Seems: The Journey to Quantum Gravity, 2017, etc.) explains his thoughts on time.
Other scientists have written primers on the concept of time for a general audience, but Rovelli, who also wrote the bestseller Seven Brief Lessons on Physics, adds his personal musings, which are astute and rewarding but do not make for an easy read. “We conventionally think of time,” he writes, “as something simple and fundamental that flows uniformly, independently from everything else, uniformly from the past to the future, measured by clocks and watches. In the course of time, the events of the universe succeed each other in an orderly way: pasts, presents, futures. The past is fixed, the future open….And yet all of this has turned out to be false.” Rovelli returns again and again to the ideas of three legendary men. Aristotle wrote that things change continually. What we call “time” is the measurement of that change. If nothing changed, time would not exist. Newton disagreed. While admitting the existence of a time that measures events, he insisted that there is an absolute “true time” that passes relentlessly. If the universe froze, time would roll on. To laymen, this may seem like common sense, but most philosophers are not convinced. Einstein asserted that both are right. Aristotle correctly explained that time flows in relation to something else. Educated laymen know that clocks register different times when they move or experience gravity. Newton’s absolute exists, but as a special case in Einstein’s curved space-time. According to Rovelli, our notion of time dissolves as our knowledge grows; complex features swell and then retreat and perhaps vanish entirely. Furthermore, equations describing many fundamental physical phenomena don’t require time.
As much a work of philosophy as of physics and full of insights for readers willing to work hard.Pub Date: May 18, 2018
ISBN: 978-0-7352-1610-5
Page Count: 256
Publisher: Riverhead
Review Posted Online: April 2, 2018
Kirkus Reviews Issue: April 15, 2018
BOOK REVIEW
BOOK REVIEW
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