Chapter32 Relativity 32-5 The dilation and the twin paradox (时间延缓P739743) The fact that two events simultaneous to one observer may not be simultaneous to a second observer suggests that time itself is not absolute For example: Observer sam on the train measures the time interval: Observer sally on the station measures the time interval: At32-5 The Dilation and the Twin Paradox (时间延缓 P739-743) The fact that two events simultaneous to one observer may not be simultaneous to a second observer suggests that time itself is not absolute. For example: Observer Sam on the train measures the time interval: Observer Sally on the station measures the time interval : t ' t