Chapter32 Relativity Key words: The theory of relativity and quantum theory Classical Physics and modern physics Inertial reference frames(惯性参考系) Event(事件) Postulate(假设) Simultaneity!y(同时性) Time dilation(时间延缓) Length contraction(长度收缩)Key words: The theory of relativity and quantum theory Classical Physics and Modern Physics Inertial reference frames(惯性参考系) Event(事件) Postulate(假设) Simultaneity(同时性) Time dilation(时间延缓) Length contraction(长度收缩)