On the cover is a quote from Popular Science,”Kaku enables the reader to see and think as Einstein did.” I wish! That would be an accomplishment greater than Einstein’s. As Kaku recounts Einstein’s major discoveries, two things stand out to me. The first is the incredible magnitude of his lifetime achievement. The second is Einstein’s unique intuitive approach beginning with mental pictures of his theories then finding the supporting mathematics. One can only marvel at a mind that could pull such revolutionary ideas out of, well, the cosmos.
1905, Einstein’s annus mirabilis, four game changing discoveries are published. First, he explained Brownian motion providing important evidence supporting atomic theory. Second, he explained the photoelectric effect which was critical to the development of quantum theory. Third, he developed the theory of special relativity giving time a whole new meaning and invalidating the idea of the ether which had been a mainstay of physics for decades. Fourth, he produced what is 100 years later still the best known equation in the world e=mc2 revealing the incredible power of the atom. 1915, Einstein develops the theory of general relativity, one of the two most profound concepts of twentieth century physics, the other being quantum mechanics. 1924, based on work with Satyendra Bose he predicts the existence of a new state of matter, the Bose Einstein Condensate, finally produced 70 years later.
Kaku clearly loves his subject and gives him every possible credit even in his later years when his chase after a unified theory was fruitless. Kaku attributes this to an inability to employ his modus operandi of beginning with a mental picture. Perhaps the problem he was trying to tackle simply was not yet ready for his intuitive approach. Think what Einstein in his prime could do with all the information and resources we have today. Kaku believes Einstein would have liked string theory. Valid or not, we can all picture vibrating strings floating around, but what might Einstein have added to that picture?
Kaku makes the science as accessible as possible. The theories are interspersed in the story of Einstein’s personal life which provides respite from the mind bending physics. The quick run through the major discoveries helps one view them as a body of work. It becomes easy to understand why Einstein’s name is synonymous with genius.