lundi 12 mars 2012

General relativity

General relativity Curved space-time Curvature of the four-dimensional space-time is the basis of general relativity. A curved space is difficult to conceive particularly the fourth dimension is peculiar. Einstein calls it t=x4. It seems simpler to consider it as an imaginary number ict where i is the quadratic root of -1 and c the speed of light. Then the space-time has the following four dimensions: (x,y,z,w=ict). Riemann coordinates Understanding of general relativity, like restricted relativity, will be easier by using two... [Lire la suite]