Arrow of time | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-14

This is an audio version of the Wikipedia Article:
Arrow of time


00:00:49 1 Eddington
00:02:17 2 Overview
00:03:11 3 Arrows
00:03:20 3.1 The thermodynamic arrow of time
00:05:22 3.2 The cosmological arrow of time
00:06:22 3.3 The radiative arrow of time
00:07:19 3.4 The causal arrow of time
00:08:32 3.5 The particle physics (weak) arrow of time
00:09:29 3.6 The quantum arrow of time
00:10:52 3.7 The quantum source of time
00:11:31 3.8 The psychological/perceptual arrow of time
00:13:26 4 See also



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SUMMARY
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The arrow of time, or time's arrow, is the concept of the "one-way direction" or "asymmetry" of time. It was
developed in 1927 by the British astronomer Arthur Eddington, and is an unsolved general physics question. This direction, according to Eddington, can be determined by studying the organization of atoms, molecules, and bodies, and might be drawn upon a four-dimensional relativistic map of the world ("a solid block of paper").Physical processes at the microscopic level are believed to be either entirely or mostly time-symmetric: if the direction of time were to reverse, the theoretical statements that describe them would remain true. Yet at the macroscopic level it often appears that this is not the case: there is an obvious direction (or flow) of time.