{"id":6010,"date":"2017-07-03T09:15:53","date_gmt":"2017-07-03T07:15:53","guid":{"rendered":"http:\/\/serveiseducatius.xtec.cat\/baixcamp\/?p=6010"},"modified":"2017-07-03T09:32:22","modified_gmt":"2017-07-03T07:32:22","slug":"magia-amb-polaritzadors","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/baixcamp\/tastet\/magia-amb-polaritzadors\/","title":{"rendered":"M\u00e0gia amb polaritzadors"},"content":{"rendered":"<table style=\"border-color: #ffffff;\">\n<tbody>\n<tr>\n<td style=\"border-color: #ffffff;\"><a href=\"http:\/\/serveiseducatius.xtec.cat\/baixcamp\/portada\/iv-fira-tastet-de-ciencia\/\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-5517\" src=\"http:\/\/serveiseducatius.xtec.cat\/baixcamp\/wp-content\/uploads\/usu950\/2016\/11\/cartell-IV-Fira-Tastet-Ci\u00e8ncia-Reus.jpg\" alt=\"cartell-IV-Fira-Tastet-Ci\u00e8ncia-Reus\" width=\"201\" height=\"284\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/baixcamp\/wp-content\/uploads\/usu950\/2016\/11\/cartell-IV-Fira-Tastet-Ci\u00e8ncia-Reus.jpg 500w, https:\/\/serveiseducatius.xtec.cat\/baixcamp\/wp-content\/uploads\/usu950\/2016\/11\/cartell-IV-Fira-Tastet-Ci\u00e8ncia-Reus-212x300.jpg 212w\" sizes=\"auto, (max-width: 201px) 100vw, 201px\" \/><\/a><\/td>\n<td style=\"border-color: #ffffff;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-6225\" src=\"http:\/\/serveiseducatius.xtec.cat\/baixcamp\/wp-content\/uploads\/usu950\/2017\/07\/m\u00e0gia-polaritzadors-2.jpg\" alt=\"m\u00e0gia-polaritzadors-2\" width=\"277\" height=\"350\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/baixcamp\/wp-content\/uploads\/usu950\/2017\/07\/m\u00e0gia-polaritzadors-2.jpg 277w, https:\/\/serveiseducatius.xtec.cat\/baixcamp\/wp-content\/uploads\/usu950\/2017\/07\/m\u00e0gia-polaritzadors-2-237x300.jpg 237w\" sizes=\"auto, (max-width: 277px) 100vw, 277px\" \/><\/td>\n<td style=\"border-color: #ffffff;\">\n<h6><b>Nivell educatiu<\/b><\/h6>\n<p>1r i 2n de Batxillerat<\/p>\n<h6><b>Centre<\/b><\/h6>\n<p>Institut de l\u2019Arbo\u00e7 &#8211; L\u2019Arbo\u00e7 (Baix Pened\u00e8s)<b><br \/>\n<\/b><\/p>\n<h6><b>Docent responsable<\/b><\/h6>\n<p>S\u00f2nia P\u00e9rez M\u00e9ndez<\/p>\n<h6><b>Modalitat<\/b><\/h6>\n<p>Modalitat de ci\u00e8ncies i tecnologia.<br \/>\nMat\u00e8ria F\u00edsica<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h6>\u00a0<b>Compet\u00e8ncies b\u00e0siques<\/b><\/h6>\n<p>Compet\u00e8ncies pr\u00f2pies de la mat\u00e8ria:<\/p>\n<ul>\n<li>La compet\u00e8ncia en indagaci\u00f3 i experimentaci\u00f3 (dissenyar i realitzar experiments, treure conclusions a partir de les evid\u00e8ncies).<\/li>\n<li>La compet\u00e8ncia en la comprensi\u00f3 i capacitat d\u2019actuar sobre el m\u00f3n f\u00edsic (aquest experiment intenta mostrar que \u00e9s la polaritzaci\u00f3 i els filtres polaritzadors).<\/li>\n<\/ul>\n<p>Compet\u00e8ncies generals del Batxillerat:<\/p>\n<ul>\n<li>La compet\u00e8ncia comunicativa (explicar all\u00f2 que est\u00e0 passant utilitzant els conceptes f\u00edsics).<\/li>\n<li>Compet\u00e8ncia en recerca<\/li>\n<li>Compet\u00e8ncia personal i interpersonal<\/li>\n<li>Compet\u00e8ncia en el coneixement i interacci\u00f3 amb el m\u00f3n<\/li>\n<\/ul>\n<h6><b>Continguts <\/b><\/h6>\n<p>Ones transversals, ones electromagn\u00e8tiques, llum visible, polaritzaci\u00f3, filtres polaritzadors o polaroides, ulleres 3D.<\/p>\n<h6><b>Descripci\u00f3 de l\u2019experi\u00e8ncia<\/b><\/h6>\n<div class=\"ast-oembed-container \" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"Ma\u0300gia amb polaritzadors\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/YRGo0vUo1kM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p><strong>Objectiu<\/strong>: Es tracta d\u2019una experi\u00e8ncia d\u2019impacte per il\u00b7lustrar el concepte de polaritzaci\u00f3 d\u2019una forma amena i aix\u00ed despertar la curiositat entre els estudiants.<\/p>\n<p><strong>Material<\/strong>: Dues l\u00e0mines de fusta de 30,0 cm x 37,0 cm pintades de color negre; dues l\u00e0mines de fusta de 30,0 cm x 34,0 cm pintades de color negre, dos marcs de fusta de 36 x \u00a040,0 cm pintats de color vermell, dues l\u00e0mines de metacrilat transparent de 34,0 cm x 38,0 cm, dos filtres polaritzadors, cola blanca, tisores, cinta adhesiva i diverses boles blanques de poliestir\u00e8 expandit.<\/p>\n<p><strong>Procediment:<\/strong><\/p>\n<ol>\n<li>En una de les l\u00e0mines de fusta de 30,0 cm X 34 cm, fer un forat al mig aproximadament de 12 cm de di\u00e0metre, per poder introduir la m\u00e0 i el bra\u00e7 dins de la capsa.<\/li>\n<li>Tallar una l\u00e0mina polaroide amb tisores en dos trossos, de tal forma que al superposar-los estiguin creuats.<\/li>\n<li>Enganxar els dos trossos de filtres polaritzadors al metacrilat pels costats amb cinta adhesiva que no es veur\u00e0 ja que quedar\u00e0 tapada pels marcs de fusta.<\/li>\n<li>Fer el mateix amb l\u2019altre l\u00e0mina polaroide i l\u2019altra l\u00e0mina de metacrilat. Vigileu de col\u00b7locar correctament els dos trossos polaroides, de tal manera, que quan la capsa estigui muntada els filtres polaritzadors queden a l\u2019interior de la capsa.<\/li>\n<li>A continuaci\u00f3, enganxar les l\u00e0mines de fusta i els marcs de fusta amb cola blanca i col\u00b7locar a dins diverses boles blanques de poliestir\u00e8 expandit.<\/li>\n<\/ol>\n<p>Al col\u00b7locar les dues l\u00e0mines de metacrilat paral\u00b7leles amb els polaritzadors, s\u2019observa com l\u2019aparici\u00f3 com d\u2019una tela negre, per\u00f2 \u00e9s un efecte visual, ja que realment no hi ha res a l\u2019interior.<\/p>\n<p><strong>Metodologia:<\/strong><\/p>\n<p>Es demana a un voluntari, si pot treure una bola de poliestir\u00e8 expandit.<\/p>\n<p>\u009fL\u2019alumne col\u00b7locar\u00e0 la m\u00e0 pel forat i sense cap problema podr\u00e0 treure la bola. La resta d\u2019alumnes veuran com la m\u00e0 del voluntari \u201ctravessa aquesta tela negra\u201d sense que es mogui, tal i com es veu a la figura.<\/p>\n<h6><b>Recursos<\/b><\/h6>\n<p>Cap en especial<\/p>\n<h6><b>Valoraci\u00f3<\/b><\/h6>\n<p>Ells veuen una rampa negre a l\u2019interior de la capsa, i al principi no saben per qu\u00e8 \u00e9s. Alguns diuen que hi ha com una tela, altres parlen que hi ha un mirall a l\u2019interior. Un cop que veuen que a l\u2019interior de la capsa no hi ha res, ja hem creat l\u2019inter\u00e8s per saber com funciona aquesta caixa. Aquesta experi\u00e8ncia intenta motivar als alumnes a entendre i \u00a0saber explicar all\u00f2 que est\u00e0 succeint a la capsa.<\/p>\n<h6><b>Per saber-ne m\u00e9s<\/b><\/h6>\n<p>P\u00e0gina Ci\u00e8ncia entre tots: <strong><a href=\"http:\/\/www.cienciaentretots.cat\/ca\/les-experiencies\/la-revista-d-experiencies\/magia-amb-polaritzadors\/\" target=\"_blank\">M\u00e0gia amb polaritzadors<\/a><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Es tracta d\u2019una experi\u00e8ncia d\u2019impacte per il\u00b7lustrar el concepte de polaritzaci\u00f3 d\u2019una forma amena i aix\u00ed despertar la curiositat entre els estudiants.<\/p>\n","protected":false},"author":124,"featured_media":6225,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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