Labels:text | screenshot | font | number OCR: RELATIVITY RELATIVITY IS THE theory that any measurement of space, time, or mass is affected by the frame of reference of the observer and is therefore relative rather than absolute. The theory of relativity was developed by the German-born physicist Albert Einstein (1879-1955). He published his ideas in two stages: the Special Theory of Relativity in 1905, and the General Theory of Relativity in 1915.
