The book I chose is called
The Fabric of the Cosmos by physicist, Brian Greene. The book has about 500 pages and I just did the math today; I'll have to read about 50 pages a week. I've already read a large portion of the book and I am convinced I'll finish it well before the due date, but I don't have a specific day set for myself.
The book's main idea, from what I can tell, is that things are not as they seem. I think that Greene's overall goal is to inspire the reader to re-examine the very essence of common experience. I have read two of the five parts of the book. The first part of the book covered the topic of how we seem to experience reality and why. He covers the history of the physics of space-time, beginning with Newtonian physics and ending on quantum physics. In the second part of the book, he explores the topic of time and why it appears to be asymmetric or one dimensional. This is one of the reasons I chose this book. I am really interested in the arrow of time and why we actually experience it.
I'll discuss three aspects of the first two parts that really blew my mind and have caused me to re-examine reality which, in my opinion, is the main idea or overall goal of the book. Greene explained how Einstein came to the famous mass-energy equivalency formula. He described how Einstein wondered what it would be like to travel next to a beam of light. He continued to explain that through experimentation, we learned that the speed of light, no matter how fast the observer is moving, always appears to be the same. In physics this is called a reference point and this point can change based on your position or velocity. No matter what your reference point is (your speed and position), light always travels the same speed. The crazy part is what this physically allows for; in order for light to stay constant, space and time literally have to warp and dilate. Einstein unified space and time and they became space-time. If we sit still, ALL of our motion is through time because we are not actually moving through space. What is weird is when we begin to move, or transfer some of our motion to space, our motion in time has to become 'smaller' or slower since we are dealing with time. Time slows down when we move. It is really cool because this concept is illustrated very well with vector resolution which I just learned about in physics.
Another mind blowing concept in the book is which has changed the way I look at things is that our past and our future have already occurred at some other reference point in the universe. Greene uses an example of someone who is on a planet 10 billion light years away. If the person walked toward our planet at a speed of 10 mph, his objective, present time would be 150 years into our planet's future. This means that as he moves, his present time is actually 150 years into our future. This means that our 'future' has already occurred to someone with a specific reference point. The huge amount of space between us allows for maximum time delay due to just a little motion. What is amazing about this is now that we know our past, present, and future could have existed in someone else's present time, you wonder who's present is 'correct'. If you look at the big picture, Greene says, all events of space-time already exist. We are only experiencing a tiny slice of the whole and our tiny slice is no more correct than someone else's tiny slice.
The final concept I want to talk about is what initially got me interested in this book, but for the sake of time I will only reveal the initial question and not Greene's proposed answer. The question of why time appears to flow like a river arises purely from math. Greene explains that our math and our science does not treat positive time any different from negative time. There is no reason in our math that explains why we can seem to 'know' the past, but only affect the future. We cannot change the past and we cannot know the future, it only works in one way. The fact that time has an 'arrow' or a preferred direction that we seem to experience is a mystery in modern physics and no real 'answer' has been revealed, but Greene offers a suggestion. It ultimately boils down to quantum mechanics, the big bang, and entropy, but I won't get into the details.
As I've already said, I think the author wrote the book to affect people's outlook on everyday experience. I know it has certainly affected me and I think it would make a big difference if everyone knew this information. It's crazy stuff and I love reading it. I can't wait to finish it.