As many of you already know, I'm not someone who is very fond of Relativity. There are several problems I have with relativity, and one of the main ones is the actually cause and effect between spacetime, the speed of light, and the observer. Here's the issue: Let's say that you have two inertial observers moving at different speeds and one beam of light. Relativity claims that time dilates and length contracts in each observers frame of reference so that they both see the beam of light travelling at c. My questions are: How does spacetime know how much length needs contracting and how much time needs dilating for an observer? Doesn't spacetime have to observe both the speed of light and the observer to know how much its length needs to contract and its time needs to dilate in order to keep the speed of light invariant for an observer? If spacetime is a seperate entity from the observer, and time dilation and length contraction are not illusions, what interaction causes the physical properties of length and time to change? What exactly is the relationship between spacetime, light, and an observer, and how exactly do they influence each other? Maybe I'm just old fashioned, but I believe that in order for a physical property to change, it must be influenced by something. Of course, the exceptions would be if that property oscillates, or is entangled in some way. However, in relativity, a property changes without any apparent influence or interaction with the objects that actually determine the amount of change of that property. This doesn't seem logical.