2) Work through and understand the “train struck by lightning” and “barn running pole vaulter” thought experiments, to better understand the relationship between space and time. It’s fairly easy (pre-calculus easy) to show that . Notice from the graph below that relativistic effects are barely noticeable until around ( is the speed of light). When physical laws work actively on scales we’re used to, they tend to become intuitive. The laws of the very big, small, old, hot, cold, fast, … are the same laws, we just experience a special case.