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Most helpful customer reviews
3.0 out of 5 stars
Interesting, but needs another edit.,
By Don (Toronto, ON Canada) - See all my reviews
This review is from: Physics of the Impossible: A Scientific Exploration into the World of Phasers, Force Fields, Teleportation, and Time Travel (Paperback)
Interesting, but needs another edit. Seems hastily written. This idea of ranking possible civilizations according to their power output only, seems short-sighted to me. It's easy to talk about future (or extraterrestrial) civilizations powerful enough to juggle star clusters as easily as juggling tennis balls, but do astronomers ever see stars being juggled like that? No. Even if it were possible, maybe ETs have other interests besides power output. Kaki occasionally tosses in off-topic opinions that can be distracting and annoying. That said, he is an accomplished physicist who knows his stuff, and who is careful to avoid making outright false statements, and despite the above caveats, I found this an interesting and entertaining read. It is mainly about the feasibility of sci-fi techs like you see in shows like Star Trek. I gave it only 3 stars because it seems like it was written in a hurry and rushed to print.
4 of 4 people found the following review helpful
5.0 out of 5 stars
Degrees of Scientific Impossibility,
By
This review is from: Physics of the Impossible: A Scientific Exploration into the World of Phasers, Force Fields, Teleportation, and Time Travel (Hardcover)
Will something that is impossible now eventually become possible? In order to answer this question, the author has divided various potentially outrageous ideas into three levels of impossibility, based on current and expected future technological capabilities and the known laws of physics: Class I impossibilities, occupying over 60% of the book, Class II impossibilities and Class III impossibilities. The higher the class level, the more impossible (or farther in the future) the possible realization of the idea is perceived to be. In progressing along these classes, the author goes from practical nuts-and-bolts solutions to various problems that may be possible in a matter of decades to centuries (Type I), to dreams whose realizations may never happen according current very abstract ideas that are at the very forefront of scientific thinking and thus very far removed from our everyday experience (Type III). The writing style is clear, friendly, authoritative and quite engaging. The book contains no diagrams whatsoever. In most cases, they are not really essential because of the author's excellent ability to express complex ideas into clearly understandable prose. However, in a few cases, diagrams would have been quite welcome. Technical terms are clearly explained as they occur so that anyone could read this book and learn a great deal from it. However, science buffs would probably appreciate it the most.On a more technical note, on a couple of occasions the author has pointed out that when an electron and an antielectron (positron) meet, they annihilate producing "gamma rays at an energy of 1.02 million electron volts or more" (p. 184) and "annihilate one another and create a gamma ray" (p. 278). The first statement can be misleading while the second one is incorrect and is likely a misprint. When an electron and a positron meet in free space, they annihilate producing two gamma rays (not one) of energy 0.511 million electron volts each (or more, depending on their relative kinetic energies when they meet); the total gamma ray energy released being (at least) 1.02 million electron volts. Production of two gamma rays is essential to conserve momentum, i.e., total momentum before the collision must equal total momentum after the collision, which is impossible if only one annihilation gamma ray is produced.
2 of 2 people found the following review helpful
3.0 out of 5 stars
Too sci-fi,
By
This review is from: Physics of the Impossible: A Scientific Exploration into the World of Phasers, Force Fields, Teleportation, and Time Travel (Paperback)
For me, this was more speculative than technical, leaving me feeling that almost anyone could have written it. I prefer reading material about more current applications and research than this book provides. The author certainly knows his physics and makes the information easy to digest for those who want to be working in physics over the next 60 years. I wish I had such information when I was in high school in 1944.
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