Schmitz W. Understanding Relativity. A Conceptual Journey...2022 torrent

Textbook in PDF format

This book bridges the huge gap between popular science and mathematical treatments of Einstein's theories. It explains special and general relativity, gravity, black holes, and gravitational waves, also presenting current ideas about dark matter and dark energy. The explanations are entirely non-mathematical, using many color pictures and clear concepts. In this way, the reader is led to a much deeper understanding than any popular science book can provide.
The author has written this book for everyone who wants to go beyond superficial descriptions of relativity's remarkable phenomena, but is not equipped to read the professional literature and complicated math behind the theory. By providing a complete description in terms of concepts and pictures, the book answers many questions about why the theory works as it does. For example, it explains why and how momentum and pressure are related to gravity; why and how mass causes spacetime to curve and how curvature tells objects how to move; it also reveals the origin of the ring seen around the first ever image of a black hole. Not least, the reader will learn in detail how gravitational waves are produced and measured.
What is (the) Matter?
On the Velocity of Massless Waves
On the Velocity of Massive Waves
The Relative, the Absolute, and the Paradoxical
The Minkowski Metric
The Equivalence Principle
The Curvature of Spacetime
How Waves Change Shapes and Volumes
The Effects of Curvature
A Journey to the Centre of a Black Hole
Black Hole Phenomena
Gravitational Waves
All that Matters in the Dark Universe
Emergent Gravity and Conclusion