与时间赛跑：相对论中时间膨胀的哲学与物理

Karmela Padavic-Callaghan The passage of time often seems like the most malleable thing in the world. A minute may feel much longer when you’re asked to hold a plank position in a workout class, and an hour may fly by when you’re chatting with a friend. In these cases, your perception of time is altered. But real, physical time dilation also happens. According to Albert Einstein’s special theory of relativity, clocks that are closer to Earth’s centre of gravity, say at sea level, tick more slowly than those at the top of a mountain. A similar slowing happens when a clock is physically travelling extremely fast. Undeniably, this sounds bizarre, but decades’ worth of experiments haven’t managed to disprove it. …