{"id":229,"date":"2018-05-22T18:16:29","date_gmt":"2018-05-22T16:16:29","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/lehning\/?p=229"},"modified":"2018-08-28T08:04:26","modified_gmt":"2018-08-28T06:04:26","slug":"paraboles-de-lhimalaya","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/lehning\/2018\/05\/22\/paraboles-de-lhimalaya\/","title":{"rendered":"Les paraboles de l&#8217;Himalaya"},"content":{"rendered":"<p><span style=\"margin: 0px;font-family: 'Arial',sans-serif;font-size: 12pt\"><span style=\"color: #000000\">Les paraboles sont utilis\u00e9es dans l\u2019Himalaya pour faire bouillir de l\u2019eau. Pour cela, il suffit de diriger son axe vers le soleil. Ses rayons sont alors r\u00e9fl\u00e9chis vers le foyer o\u00f9 on a plac\u00e9 une casserole. <\/span><\/span><\/p>\n<h2>La parabole et son foyer<\/h2>\n<figure id=\"attachment_232\" aria-describedby=\"caption-attachment-232\" style=\"width: 290px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-232 size-full\" src=\"https:\/\/blogs.futura-sciences.com\/lehning\/wp-content\/uploads\/sites\/13\/2018\/04\/Parabole2.jpg\" alt=\"\" width=\"290\" height=\"273\" \/><figcaption id=\"caption-attachment-232\" class=\"wp-caption-text\">Si le soleil est dans l&#8217;axe de la parabole, ses rayons r\u00e9fl\u00e9chis passent tous par le foyer.<\/figcaption><\/figure>\n<p><span style=\"margin: 0px;font-family: 'Arial',sans-serif;font-size: 12pt\"><span style=\"color: #000000\">Selon la l\u00e9gende, Archim\u00e8de aurait utilis\u00e9 ce proc\u00e9d\u00e9 pour incendier les voiles des navires romains lors du si\u00e8ge de Syracuse en 212 avant J\u00e9sus-Christ. Nous pouvons douter de la r\u00e9alit\u00e9 de cette anecdote, car le moindre mouvement des bateaux suffit pour placer leurs voiles loin du foyer. Les servants du miroir parabolique auraient bien du mal \u00e0 les suivre. Il est plus facile de chauffer une bouilloire immobile que la voile d\u2019un navire en mouvement\u00a0!<\/span><\/span><\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Les paraboles sont utilis\u00e9es dans l\u2019Himalaya pour faire bouillir de l\u2019eau. Pour cela, il suffit de diriger son axe vers le soleil. Ses rayons sont alors r\u00e9fl\u00e9chis vers le foyer o\u00f9 on a plac\u00e9 une casserole. La parabole et son foyer Selon la l\u00e9gende, Archim\u00e8de aurait utilis\u00e9 ce proc\u00e9d\u00e9 pour incendier les voiles des navires &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/lehning\/2018\/05\/22\/paraboles-de-lhimalaya\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Les paraboles de l&#8217;Himalaya<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":12,"featured_media":231,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[67,29,13,10],"tags":[68,26],"class_list":["post-229","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ecologie","category-maths-2","category-photographies","category-voyages","tag-ecologie","tag-himalaya"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les paraboles de l&#039;Himalaya, par Herv\u00e9 Lehning<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/lehning\/2018\/05\/22\/paraboles-de-lhimalaya\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les paraboles de l&#039;Himalaya, par Herv\u00e9 Lehning\" \/>\n<meta property=\"og:description\" content=\"Les paraboles sont utilis\u00e9es dans l\u2019Himalaya pour faire bouillir de l\u2019eau. 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