If you are interested in physics from the realm of science fiction from teleportation to invisibility then this is the book for you. Michio Kaku explores a wide range of ideas that according to our current understanding of physics seem impossible, however, according to Kaku they are not, atleast not acording to the usual definition of impossible. Kaku redefines the word “impossible,” form unable to happen to unable to happen yet. He organises these concepts into three classes of impossibility:
Class I impossibilities: Technologies that are currently impossible but do not violate any known laws of physics. He reckons that these impossibilities might be possible within the next couple of hundred years. This includes teleportation, antimatter engines, certain forms of telepathy, psychokinesis,and invisibility.
Class II impossibilities: These are technologies that are currently on the boundary of our understanding of the physical world. If they are even possible at all they will take millennia or maybe even millions of years in the future. This section includes time machines, the possibility of hyperspace travel, and travel through wormholes.
Class III impossibilities: These technologies are ones that are truly impossible as they violate the known laws of physics. They will require a radical and fundamental shift in our understanding of the world in order to be realised. Surprisingly this topic only contains two things, perpetual motion and precognition.
In this book Michio Kaku explores concepts at the very fringe of physics and elegantly explains them. If you are keen physicist/physics reader, then you are probably already adept with the ideas presented. However, he presents them within thought provoking discussions. Each chapter starts with an interesting quote, may favourite being:
“If at first an idea does not sound absurd, then there is no hope for it.” Albert Einstein
This is the first physics book that I read, and has inspired me to continue reading and delving into the world that is physics.