Consider an observer oving to the right with velocity b relative to observer s. a rod of length l is at rest in s' and aligned with the relative velocity. observer s has learned from er textbook that if she records the positions of the ends of the rod at the same instant. she will find the rod to be foreshortened to length l/r. now s thinks to herself that maybe she can measure the proper length of the rod by adopting an alternative procedure in which easures the positions of the e nds of the rod no she m t at the same instant but at temporally distinct instants such that s 's clocks at the ends of the rod show the same time at the two instants. those clocks, after all, show the same time when s' measures the length of the rod. what does s find for the length of the rod using this method? does she fulfill her ambition' how does her result compare with the naive measurement?