Veo la dificultad, por supuesto. Tal vez sea un optimista incurable. Este libro tiene cuatro niveles diferentes de lectura. Puede decidir simplemente introducirse y mirar. Agradecimientos particulares merecen Lee Smolin, Kelly Stelle y Lane Hughston por su ayuda en numerosos y variados puntos.
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Overview[ edit ] The book discusses the physical world. Many fields that 19th century scientists believed were separate, such as electricity and magnetism , are aspects of more fundamental properties.
Some texts, both popular and university level, introduce these topics as separate concepts, and then reveal their combination much later. The Road to Reality reverses this process, first expounding the underlying mathematics of space—time , then showing how electromagnetism and other phenomena fall out fully formed.
Physics enters the discussion on page with the topic of space—time. From there it moves on to fields in spacetime, deriving the classical electrical and magnetic forces from first principles ; that is, if one lives in spacetime of a particular sort, these fields develop naturally as a consequence.
Energy and conservation laws appear in the discussion of Lagrangians and Hamiltonians , before moving on to a full discussion of quantum physics, particle theory and quantum field theory. A discussion of the measurement problem in quantum mechanics is given a full chapter; superstrings are given a chapter near the end of the book, as are loop gravity and twistor theory. The book ends with an exploration of other theories and possible ways forward. He is skeptical about string theory , to which he prefers loop quantum gravity.
He is optimistic about his own approach, twistor theory. He also holds some controversial views about the role of consciousness in physics, as laid out in his earlier books see Shadows of the Mind.
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