Release date is 2022-01-04

Touch and sight: the earth and the heavens -- What happens and what is observed -- The velocity of light -- Clocks and foot-rules -- Space-time -- The special theory of relativity -- Intervals in space-time -- Einstein's law of gravitation -- Proofs of Einstein's law of gravitation -- Mass, momentum, energy, and action -- Is the universe finite? -- Conventions and natural laws -- The abolition of "force" -- What is matter? -- Philosophical consequences.

Tim Lindell and the Online Distributed Proofreading Team at https://www.pgdp.net (This book was produced from images made available by the HathiTrust Digital Library.)

"The A B C of Relativity" by Bertrand Russell is a scientific publication written in the early 20th century. The book aims to elucidate Albert Einstein's theory of relativity, making complex concepts accessible to a general audience. In this work, Russell addresses the challenges posed by new scientific ideas, especially regarding our understanding of space, time, and the universe. The beginning of the book introduces readers to the profound impact of relativity on our understanding of the physical world, emphasizing that many traditional notions based on touch and sight need to be rethought. Russell discusses the limitations of common sense and how pre-existing biases influence our perception of motion and stability. He uses vivid metaphors—like imagining a drugged balloonist—to illustrate the relativity of motion and our need to adapt our mental frameworks to accommodate Einstein's revolutionary ideas. Through this opening, Russell sets the stage for a deeper exploration of relativity's implications for concepts like force, gravity, and the nature of reality as he prepares the reader for more complex discussions in subsequent chapters. (This is an automatically generated summary.)

Originally published: United States: Harper & Brothers, 1925