{"id":255,"date":"2020-02-21T17:48:54","date_gmt":"2020-02-21T16:48:54","guid":{"rendered":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/?page_id=255"},"modified":"2020-02-21T17:49:45","modified_gmt":"2020-02-21T16:49:45","slug":"24-tubo-di-geissler","status":"publish","type":"page","link":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/24-tubo-di-geissler\/","title":{"rendered":"24.   Tubo di Geissler"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"237\" height=\"300\" src=\"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20200121_160945-237x300.jpg\" alt=\"\" class=\"wp-image-256\" srcset=\"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20200121_160945-237x300.jpg 237w, https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20200121_160945-768x972.jpg 768w, https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-content\/uploads\/2020\/02\/20200121_160945-809x1024.jpg 809w\" sizes=\"(max-width: 237px) 100vw, 237px\" \/><\/figure>\n\n\n\n<p><strong>IT<\/strong> &#8211; Inventato nel&nbsp;<a href=\"https:\/\/it.wikipedia.org\/wiki\/1857\">1857<\/a>&nbsp;dal fisico tedesco&nbsp;<a href=\"https:\/\/it.wikipedia.org\/wiki\/Heinrich_Geissler\">Heinrich Geissler<\/a>, esso \u00e8 un tubo di vetro che pu\u00f2 avere le pi\u00f9 svariate forme ed \u00e8 utilizzato per misurare la conduzione di determinati gas. All\u2019interno presenta infatti un gas rarefatto, ha le pareti&nbsp;<a href=\"https:\/\/it.wikipedia.org\/wiki\/Fluorescenza\">fluorescenti<\/a>&nbsp;e una&nbsp;<a href=\"https:\/\/it.wikipedia.org\/wiki\/Pressione\">pressione<\/a>&nbsp;molto inferiore a quella dell&#8217;ambiente. Pu\u00f2 essere considerato l&#8217;antenato dei moderni&nbsp;<a href=\"https:\/\/it.wikipedia.org\/wiki\/Tubo_al_neon\">tubi al neon<\/a>. Quando una corrente elettrica passa attraverso il tubo, il gas all\u2019interno viene ionizzato, diventando un conduttore, provoca un\u2019intensa emissione luminosa. Diversi gas producono luce di colore differente: l\u2019idrogeno produce una luce rossa, l\u2019acido carbonico una luce verdastra e l\u2019azoto una luce gialla tendente all\u2019arancione. <\/p>\n\n\n\n<p><strong>GB<\/strong> &#8211;\u00a0 Geissler tube &#8211; Invented in 1857 by the German physicist Heinrich Geissler, it is a glass tube that can have the most varied forms and is used to measure the conduction of certain gases. In fact, it has a rarefied gas inside, has fluorescent walls and a much lower pressure than that of the environment. It can be considered the ancestor of modern neon tubes. When an electric current passes through the tube, the gas inside is ionized, becoming a conductor, causes an intense light emission. Different gases produce light of different colors: hydrogen produces a red light, carbonic acid a greenish light and nitrogen a yellow light tending to orange. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>IT &#8211; Inventato nel&nbsp;1857&nbsp;dal fisico tedesco&nbsp;Heinrich Geissler, esso \u00e8 un tubo di vetro che pu\u00f2 avere le pi\u00f9 svariate forme ed \u00e8 utilizzato per misurare la conduzione di determinati gas.&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages\/255"}],"collection":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/comments?post=255"}],"version-history":[{"count":2,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages\/255\/revisions"}],"predecessor-version":[{"id":260,"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/pages\/255\/revisions\/260"}],"wp:attachment":[{"href":"https:\/\/www.liceoalessandrovolta.edu.it\/measurement\/wp-json\/wp\/v2\/media?parent=255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}