{"id":911,"date":"2013-06-30T15:30:35","date_gmt":"2013-06-30T13:30:35","guid":{"rendered":"http:\/\/jovien.net\/wordpress\/?p=911"},"modified":"2013-06-30T16:36:29","modified_gmt":"2013-06-30T14:36:29","slug":"levitation-sur-ruban-de-mobius","status":"publish","type":"post","link":"https:\/\/jovien.net\/wordpress\/2013\/06\/30\/levitation-sur-ruban-de-mobius\/","title":{"rendered":"L\u00e9vitation sur un ruban de M\u00f6bius"},"content":{"rendered":"<p style=\"text-align: justify;\">Dans cette vid\u00e9o, <a class=\"hcard\" id=\"h_74\" href=\"http:\/\/richannel.org\/andrew-marmery\">Andrew Marmery<\/a> de la \u00ab\u00a0<a href=\"http:\/\/richannel.org\/about\" target=\"_blank\">Royal Institution of Great Britain<\/a>\u00a0\u00bb, institution royale britannique s&rsquo;occupant entre autres choses de vulgarisation scientifique, fait une d\u00e9monstration de l\u00e9vitation sur un <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Ruban_de_M%C3%B6bius\" target=\"_blank\">ruban de M\u00f6bius <\/a>recouvert de 2 000 aimants au neodynium.<\/p>\n<p><a title=\"By David Benbennick (Own work) [GFDL (http:\/\/www.gnu.org\/copyleft\/fdl.html), CC-BY-SA-3.0 (http:\/\/creativecommons.org\/licenses\/by-sa\/3.0\/) or CC-BY-SA-2.0 (http:\/\/creativecommons.org\/licenses\/by-sa\/2.0)], via Wikimedia Commons\" href=\"https:\/\/commons.wikimedia.org\/wiki\/File%3AM%C3%B6bius_strip.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" alt=\"M\u00f6bius strip\" src=\"\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/d\/d9\/M%C3%B6bius_strip.jpg\/256px-M%C3%B6bius_strip.jpg\" width=\"256\" height=\"159\" \/><\/a><\/p>\n<p style=\"text-align: justify;\">Un ruban de M\u00f6bius est un anneau ne poss\u00e9dant qu&rsquo;une seule face comme on peut voir sur l&rsquo;image ci-contre que l&rsquo;on peut facilement faire d&rsquo;une bande de papier que l&rsquo;on colle aux extr\u00e9mit\u00e9s mais en inversant le recto et le verso. En tra\u00e7ant une ligne au milieu du ruban, vous pouvez vous apercevoir que celle ci est visible aussi bien \u00e0 l&rsquo;int\u00e9rieur que \u00e0 l&rsquo;ext\u00e9rieur de l&rsquo;anneau.<\/p>\n<p style=\"text-align: justify;\">Sur cette piste de m\u00e9tal aimant\u00e9e il fait l\u00e9viter un petit bateau confectionn\u00e9 dans un mat\u00e9riaux magn\u00e9tique <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Supraconduction\" target=\"_blank\">supraconducteur<\/a> (oxyde de cuivre, de baryum et yttrium) creux dans lequel il verse de l&rsquo;<a href=\"https:\/\/fr.wikipedia.org\/wiki\/Azote_liquide\" target=\"_blank\">azote liquide<\/a> (donc \u00e0 une temp\u00e9rature inf\u00e9rieure \u00e0 -195,79\u00a0<abbr title=\"degr\u00e9 Celsius\">\u00b0C<\/abbr>) pour maintenir les propri\u00e9t\u00e9s supraconductrices :<\/p>\n<p>httpv:\/\/youtu.be\/zPqEEZa2Gis<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans cette vid\u00e9o, Andrew Marmery de la \u00ab\u00a0Royal Institution of Great Britain\u00a0\u00bb, institution royale britannique s&rsquo;occupant entre autres choses de vulgarisation scientifique, fait une d\u00e9monstration de l\u00e9vitation sur un ruban de M\u00f6bius recouvert de 2 000 aimants au neodynium. Un &hellip; <a href=\"https:\/\/jovien.net\/wordpress\/2013\/06\/30\/levitation-sur-ruban-de-mobius\/\">Continuer la lecture <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-911","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/posts\/911","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/comments?post=911"}],"version-history":[{"count":18,"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/posts\/911\/revisions"}],"predecessor-version":[{"id":929,"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/posts\/911\/revisions\/929"}],"wp:attachment":[{"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/media?parent=911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/categories?post=911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jovien.net\/wordpress\/wp-json\/wp\/v2\/tags?post=911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}