electrons -- Relativistic velocity addition... 1. The problem statement, all variables and given/known data an observer measures the velocity of two electrons, finding one with a speed c/2 in the x direction and the other c/2 in the y direction. what is the relative speed of the two electrons. 2. Relevant equations 3. The attempt at a solution Im not sure if this is right it seemed to easy. but suppose that electron 1 is called b and the other a then v(b)= √(c2/4+c2/4) since they are at right angles to each other. is this right?