Verbal Description of General Relativity (General Relativity from A to B by Robert Geroch)

The author presents fundamental ideas of theory of relativity in a non-mathematical form using conversation approach to readers with little science background. The book is highly descriptive and the reader is bound to get bored since this is a discussion of about basic ideas about space and time using two-dimensional space-time diagrams. The first part of the book describes the notion of space and time in terms of Aristotelian and Galilean view points. The second half describes how the idea of spatial distance and elapsed time (interval) are incorporated into space time as geometrical entity. The author uses a general framework in this book for explaining general relativity. This is done by describing an event and assemble them into space-time (in a space-time diagram) and describe what is going-on in the physical world in terms of collection of events, and relationships between events is evaluated using measuring instruments such as light pulses and clocks. The intrinsic relationship between two events is described by interval (measured by physical experiences of observers). From the interval, one determines how light goes and how clock move and tick. The author eventually explains how equating intervals leads to relationship between `real' physical measurements. The interval is a sort of misty thing that stands in the background and integrates into space-time. In the final chapter the author discusses an application of general relativity to understand the properties of blackholes: It is here that the readers appreciate the importance relativity. The reader must have patience to read this book and he/she must be prepared to read chapters 5 and 6 second and perhaps third time to understand the underlying concept. If you do not have patience you will be lost and you will dislike this book

Reference: General Relativity from A to B by Robert Geroch