Draw on a spacetime diagram in the fi xed system a line expressing all the events in the moving system that occur at t' = 0 if the clocks are synchronized at t= t'= 0. (b) What is the slope of this line? (c) Draw lines expressing events occurring for the four times t'4, t'3, t'2, and t'1 where t'4< t'3< 0 <t'2< t'1. (d) How are these four lines related geometrically?

Draw on a spacetime diagram in the fi xed system a line expressing all the events in the moving system that occur at t' = 0 if the clocks are synchronized at t= t'= 0. (b) What is the slope of this line? (c) Draw lines expressing events occurring for the four times t'4, t'3, t'2, and t'1 where t'4< t'3< 0 <t'2< t'1. (d) How are these four lines related geometrically?