{"id":235100,"date":"2016-06-16T02:00:00","date_gmt":"2016-06-15T23:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=b6847b2d2099ec082916d267108f71db"},"modified":"2016-06-16T02:00:00","modified_gmt":"2016-06-15T23:00:00","slug":"the-twin-paradox-in-relativistic-rigid-motion-2","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=235100","title":{"rendered":"The ?twin paradox? in relativistic rigid motion"},"content":{"rendered":"<p>Relativistic rigid motion suggests a new version for the so-called ?twin paradox?, comparing the<br \/>\nages of two astronauts on a very long spaceship. Although there is always an instantaneous inertial<br \/>\nframe in which the whole spaceship, being rigid, is simultaneously at rest, the twins? ages,<br \/>\nmeasured as the proper-times along their individual world lines, are different when they are located<br \/>\nat remote parts of the spaceship. The age, or proper-time, difference depends on the distance at<br \/>\nrest between the astronauts and the rapidity difference between start to end. The relation of the<br \/>\nage difference with the relative Doppler shift of light signals transmitted between the astronauts<br \/>\nand implications for the possibility to assign a common age (proper-time) to complex, spatially<br \/>\nextended, relativistic systems are also discussed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Relativistic rigid motion suggests a new version for the so-called ?twin paradox?, comparing the<br \/>\nages of two astronauts on a very long spaceship. Although there is always an instantaneous inertial<br \/>\nframe in which the whole spaceship, being rigid, is s&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-235100","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/235100","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=235100"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/235100\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=235100"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=235100"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=235100"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}