Einstein's relativity

Einstein’s relativity includes two main ideas: special relativity and general relativity. Special relativity shows that the laws of physics are the same for all steady-moving observers and that the speed of light is constant. It reveals that time and space are intertwined, so moving very fast slows time and lengthens objects. General relativity describes gravity not as a force but as the bending of spacetime by mass and energy. Massive objects like stars warp spacetime, causing objects to move along curved paths—what we perceive as gravity. These theories revolutionized our understanding of the universe’s structure and behavior.