Einstein's theory of relativity
Einstein's theory of relativity consists of two parts: special relativity and general relativity. Special relativity, introduced in 1905, reveals that the laws of physics are the same for all observers and shows how time and space are interconnected, leading to concepts like time dilation and mass-energy equivalence (E=mc²). In 1915, general relativity expanded this by describing gravity not as a force, but as the curvature of space-time caused by mass. This means that massive objects like planets and stars warp the space around them, affecting the movement of other objects and the flow of time in their vicinity.
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Einstein's Theory of Relativity comprises two parts: Special Relativity and General Relativity. Special Relativity (1905) asserts that the laws of physics are the same for all observers, regardless of their relative motion, and introduces the idea that the speed of light is constant for everyone. This leads to concepts like time dilation and length contraction. General Relativity (1915) expands this by describing gravity not as a force, but as the curvature of space-time caused by mass. Massive objects, like planets, warp the space around them, influencing the motion of other objects and light, resulting in the observed effects of gravity.