On page 7 of this book the author refers to the expression under the square root sign He is setting out the mathematical basis of the phenomenon of time dilation Unfortunately, there is no square root sign in the equations set out here, so mathematically challenged folk like me are even at sea I take the view that relativity is so interesting that, despite its practical irrelevance to common experience, anyone with a reasonable education ought to be able to understand the basic concept Why not put the final equation of a series like that at 1 on page 7 in a box on the page with identifying notes for each of the symbols The box could be headed It can be shown that As to how, the whole sequence of equations could be put in an appendix for those who are better at manipulating abstractions For some, mathematics is a language, but not for all. Quite simply this is the best introduction to Special and General Relativity you will ever read It s taken scientists a couple of generations to make it this easy This book is suitable for introducing an A level student to the subject The only thing I would like to add is the observation that gravity IS the time dilation gradient In other words it s just a part of the fabric of space time. Very helpful and concise Brilliantly written and broad enough in coverage whilst whetting the appetite for further reading Great for the lay reader For people interested in Relativity, wanting a reliable descripion of what it is and the effect it has without going through the mathematics that Einstein used to support his theory, this is an excellent little book Its very readable and packed with facts.I have two other volumes in the series, Particle Physics and Quantum Theory, and can recommend these also an excellent series. Excellent introduction to the subject However, if you are already or less familiar with the fundamental concepts of relativity, then this Very Short Introduction is a little too short You probably want something a little advanced maybe something at the intermediate level. Well written good product quick delivery This series of very short introduction books has helped me get a lot of hard concepts in my head Although there is not much mathematics in this book kinda funny as relativity is written in tensors I d recommend anyone read this just to get to grips with the basic ideas before taking a rigorous approach. If you move at high speed, time slows down, space squashes up, and you get heavier Travel fast enough, and you could weigh as much as a jumbo jet, be flattened thinner than a CD without feeling a thing and live forever As for the angles of a triangle, they do not always have to add up todegrees And then, of course, there are black holes These are but a few of the extraordinary consequences of Einstein s theory of relativity It is now over a hundred years since he made these discoveries, and yet the general public is still largely unaware of them Filled with illuminating anecdotes and fascinating accounts of experiments, this book aims to introduce the interested lay person to the subject of relativity in a way which is accessible and engaging and at the same time scientifically rigorous With relatively few mathematical equations nothing complicated than the Pythagoras theorem this VSI packs a lot of time into very little space, and for anyone who has felt intimidated by Einstein s groundbreaking theory, it offers the perfect place to start I must first of all confess that this was not my first approximation to the topic so I do not know if someone with no experience with the subject will have the same experience than me That said, I was not trained as a physicist, but I always was fascinated by it and its consequences on how we ought to understand the world around us.You can read this book in very little time it took me 2 days, but then again I couldn t put the book down but it is extremely informative Professor Stannard managed to cover an enormous amount of material without ever making the text overly dense Indeed, of all my approximations to the Theory of Relativity, this is by far the best It really dissipated some questions I had on the topic that were not well addressed in other mediums Some mathematics are indeed used but they are never exceedingly complex and, importantly, truly help illuminate the concepts at hand rather than make it feel confusing. this book provides a clear cut idea about the theory of relativity,the examples are good,a good book for the students who want to understand the mechanics of space and time