tag:blogger.com,1999:blog-5237654928835551390.post2283699281526024614..comments2017-09-06T11:14:09.128+01:00Comments on Physics Satire About the Theory of Everything: Counting dimensionsClara, once known as Nemohttp://www.blogger.com/profile/15931393389874902234noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5237654928835551390.post-2225850286946304852013-09-19T16:59:47.991+01:002013-09-19T16:59:47.991+01:00If there are four limit laws -- maximum speed, max...If there are four limit laws -- maximum speed, maximum force, minimum action, and minimum entropy -- then physical reality should be four-dimensional. But then if you try to determine those limits exactly, you come up against a problem: roughly you cannot imagine an experiment to determine one of the limits to a better accuracy than the minimum amount of time compared to the age of the universe.<br /><br />But if the limits are only knowable approximately, then the dimensions are only approximate. So how many dimensions exactly? No answer.<br /><br />How many dimensions in practice? Four obviously. You only need look around. Did I go wrong?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5237654928835551390.post-3468275098970215202013-09-18T13:00:44.195+01:002013-09-18T13:00:44.195+01:00Clara, I remembered something about this from Schi...Clara, I remembered something about this from Schiller's volume 6 of Motion Mountain. I forgot what he said, so I had to have a little re-read. He says at the minimum length scale, you cannot perform the experiments to determine the dimensions of space.<br /><br />Makes sense to me :)<br /><br />I wonder if the best number of dimensions to suppose depends upon what you are trying to calculate. Use four, say, but if using four won't give you an answer, try using two or ten or whatever. Choose the model in which the problem has its simplest expression.<br /><br />And somebody says, 'Yes but how many dimensions really?'. Do we answer, 'There is no really exactly. Such ideology just gives you blinkers.'?Anonymousnoreply@blogger.com