Relativity Principle

The Relativity Principle, primarily developed by Albert Einstein, states that the laws of physics are the same for all observers, regardless of their relative motion. This means that whether you're standing still, moving fast, or even in a gravitational field, the fundamental physics governing the universe remain constant. It also implies that time and space are connected, leading to effects like time dilation—where time moves differently depending on speed or gravity. This principle fundamentally changed our understanding of space, time, and the workings of the universe.