Modern editions with introductions by renowned physicists like Roger Penrose are available through retailers like Amazon .
The book is divided into three main parts that build from the basics of motion to the grand structure of the cosmos: Relativity: The Special and the General Theory,...
Einstein breaks down the conventional idea of "absolute time". He introduces the Principle of Relativity , which states that the laws of physics are the same for all observers moving at constant speeds, and the fact that the speed of light is constant regardless of motion. This leads to the famous conclusion that time and space are relative and linked as "spacetime". This leads to the famous conclusion that time
Because the original work is in the public domain, you can find it for free or as high-quality reprints: He uses the "Principle of Equivalence" to show
This section expands relativity to include gravity. Einstein describes gravity not as a force between objects, but as a curvature of spacetime caused by mass and energy. He uses the "Principle of Equivalence" to show that being in a gravitational field is indistinguishable from accelerating.
