The passage of time from "summary" of Seven Brief Lessons on Physics by Carlo Rovelli
The concept of time is a tricky one in physics. Time is not something that flows at the same pace for everyone and everything. Time is not absolute; it is relative. Time is intertwined with space, forming a four-dimensional structure called spacetime. Einstein's theory of general relativity revolutionized our understanding of time. According to general relativity, time is not separate from space but is woven together with it in a single fabric. This fabric can be warped and curved by the presence of matter and energy, affecting the passage of time. In regions of strong gravitational fields, time can slow down. This phenomenon, known as time dilation, has been confirmed by numerous experiments. For example, clo...
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