Suppose that two events occur on the x axis of an inertial frame, Δx apart with a time interval between the events of Δt. a) the proper time interval between the events is...? b) the proper distance between the events is...? I think I'm just getting confused by the wording. I imagined that I was in the same frame of reference, and therefore the answers are Δt and Δx. But evidently, I'm wrong. Do I need to set the speed of the frame to 'v' and do something with simultaneous equations to remove that variable? Thanks!