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3 ideas
19949 | Quantum theory relies on a clock outside the system - but where is it located? [New Sci.] |
Full Idea: After general relativity, quantum mechanics reinstated our familiar notion of time. The buzzing of the quantum world plays out according to the authoritative tick of a clock outside the described system, ...but where is this clock doing its ticking? | |
From: New Scientist writers (New Scientist articles [2013], 2017.02.04) |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |
Full Idea: Posidonius defined time thus: it is an interval of motion, or the measure of speed and slowness. | |
From: report of Posidonius (fragments/reports [c.95 BCE]) by John Stobaeus - Anthology 1.08.42 | |
A reaction: Hm. Can we define motion or speed without alluding to time? Looks like we have to define them as a conjoined pair, which means we cannot fully understand either of them. |
19951 | Entropy is puzzling, so we may need to build new laws which include time directionality [New Sci.] |
Full Idea: Smolin observes that if entropy increases, the early universe must have been highly ordered, which we cannot explain. Maybe we need to build time directionality into the laws, instead of making time depend on entropy. | |
From: New Scientist writers (New Scientist articles [2013], 2017.02.04) | |
A reaction: [compressed] |