@editz.kyo: The theory of relativity, developed by Albert Einstein, consists of special relativity (1905) and general relativity (1915). Special relativity establishes that the laws of physics are the same for all non-accelerating observers and that the speed of light is constant, leading to the concept of spacetime. General relativity expands on this by explaining gravity not as a force, but as the geometric curvature of spacetime caused by mass and energy. #maths #physics #uktiktok #alevel #mathtok