{"id":133023,"date":"2021-12-24T21:23:58","date_gmt":"2021-12-25T05:23:58","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2021\/12\/time-dilation"},"modified":"2021-12-24T21:23:58","modified_gmt":"2021-12-25T05:23:58","slug":"time-dilation","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2021\/12\/time-dilation","title":{"rendered":"Time dilation"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/time-dilation.jpg\"><\/a><\/p>\n<p>In <a href=\"https:\/\/en.wikipedia.org\/wiki\/Physics\" title=\"Physics\">physics<\/a> and <a href=\"https:\/\/en.wikipedia.org\/wiki\/Theory_of_relativity\" title=\"Theory of relativity\">relativity<\/a>, <b>time dilation<\/b> is the difference in the elapsed <a href=\"https:\/\/en.wikipedia.org\/wiki\/Time_in_physics\" title=\"Time in physics\">time<\/a> as measured by two clocks. It is either due to a relative <a href=\"https:\/\/en.wikipedia.org\/wiki\/Velocity\" title=\"Velocity\">velocity<\/a> between them (<a href=\"https:\/\/en.wikipedia.org\/wiki\/Special_relativity\" title=\"Special relativity\">special relativistic<\/a> \u201ckinetic\u201d time dilation) or to a difference in <a href=\"https:\/\/en.wikipedia.org\/wiki\/Gravitational_potential\" title=\"Gravitational potential\">gravitational potential<\/a> between their locations (<a href=\"https:\/\/en.wikipedia.org\/wiki\/General_relativity\" title=\"General relativity\">general relativistic<\/a> <a href=\"https:\/\/en.wikipedia.org\/wiki\/Gravitational_time_dilation\" title=\"Gravitational time dilation\">gravitational time dilation<\/a>). When unspecified, \u201ctime dilation\u201d usually refers to the effect due to velocity.<\/p>\n<p>After compensating for varying signal delays due to the changing distance between an <a href=\"https:\/\/en.wikipedia.org\/wiki\/Observer_(special_relativity)\" title=\"Observer (special relativity)\">observer<\/a> and a moving clock (i.e. <a href=\"https:\/\/en.wikipedia.org\/wiki\/Doppler_effect\" title=\"Doppler effect\">Doppler effect<\/a>), the observer will measure the moving clock as ticking <i>slower<\/i> than a clock that is at rest in the observer\u2019s own <a href=\"https:\/\/en.wikipedia.org\/wiki\/Reference_frame\" class=\"\" title=\"Reference frame\">reference frame<\/a>. In addition, a clock that is close to a massive body (and which therefore is at lower gravitational potential) will record less elapsed time than a clock situated further from the said massive body (and which is at a higher gravitational potential).<\/p>\n<p>These predictions of the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Theory_of_relativity\" title=\"Theory of relativity\">theory of relativity<\/a> have been repeatedly confirmed by experiment, and they are of practical concern, for instance in the operation of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Satellite_navigation\" title=\"Satellite navigation\">satellite navigation<\/a> systems such as <a href=\"https:\/\/en.wikipedia.org\/wiki\/GPS\" class=\"\" title=\"GPS\">GPS<\/a> and <a href=\"https:\/\/en.wikipedia.org\/wiki\/Galileo_(satellite_navigation)\" title=\"Galileo (satellite navigation)\">Galileo<\/a>.<sup id= cite_ref-Ashby_1-1 class= reference>[1]<\/sup> Time dilation has also been the subject of science fiction works.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In physics and relativity, time dilation is the difference in the elapsed time as measured by two clocks. It is either due to a relative velocity between them (special relativistic \u201ckinetic\u201d time dilation) or to a difference in gravitational potential between their locations (general relativistic gravitational time dilation). When unspecified, \u201ctime dilation\u201d usually refers to [\u2026]<\/p>\n","protected":false},"author":359,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[219],"tags":[],"class_list":["post-133023","post","type-post","status-publish","format-standard","hentry","category-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/133023","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/359"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=133023"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/133023\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=133023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=133023"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=133023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}