A Simple and Possibly New Way to Deduce Special Relativity
Imagine an object some distance in front of you moving toward you also imagine a second object moving in a line perpendicular to the line of motion of the first with the two on a collision course with that point of collision some distance in front of you. If we assume that the motion of light obeys Galilean Relativity then what we will observe of the collision is the first object being deflected with the second object still some distance away from the first. This seems to me to be an uncomfortable situation as I prefer to believe that cause and effect should always be observed. Thus we may consider to assume a principle of "conservation of the observation of causality" and thus insist that the light from the two objects at the moment of collision reach our eyes at the same time which requires that the speed of light be constant. | v o obj 0 --- . . y . . . d t=0 . . ob