{"id":321,"date":"2014-03-29T14:21:18","date_gmt":"2014-03-29T12:21:18","guid":{"rendered":"http:\/\/www.athenor.com\/art-et-sciences\/?p=321"},"modified":"2015-12-22T23:38:24","modified_gmt":"2015-12-22T21:38:24","slug":"a-jean-zay-de-lopaque-a-la-transparence","status":"publish","type":"post","link":"https:\/\/www.athenor.com\/art-et-sciences\/?p=321","title":{"rendered":"\u00c0 Jean Zay : de l\u2019opaque \u00e0 la transparence"},"content":{"rendered":"<p style=\"text-align: justify;\"><strong>Tout se d\u00e9roule derri\u00e8re le \u00ab\u00a0ciel blanc\u00a0\u00bb. C\u2019est comme cela qu\u2019ils l\u2019appellent, cet \u00e9cran fabriqu\u00e9 \u00e0 partir d\u2019un cadre en bois sur lequel est tendu un grand drap blanc. <\/strong><\/p>\n<p style=\"text-align: justify;\">C\u2019est tout de suite plus po\u00e9tique avec des enfants\u00a0! Mais un ciel blanc sans soleil ce n\u2019est pas tr\u00e8s joyeux. Un r\u00e9troprojecteur s\u2019allume au fond de la salle et investit les lieux. L\u2019ombre de petites silhouettes commencent \u00e0 se dessiner sur le sol, et viennent s\u2019incruster sur le drap tendu. Sans trop m\u00eame s\u2019en apercevoir, ils d\u00e9montrent que le corps humain ne laisse pas passer les rayons de la lumi\u00e8re, puisqu\u2019il est \u00ab\u00a0opaque\u00a0\u00bb r\u00e9pondent en ch\u0153ur les jeunes \u00e9l\u00e8ves. La le\u00e7on est apprise\u00a0! Tandis que l&rsquo;institutrice pose sur la t\u00eate des deux premiers volontaires de jolies couronnes color\u00e9es, leurs petits camarades paraissent enchant\u00e9s. Car \u00e0 la diff\u00e9rence du corps, ces couronnes laissent pass\u00e9es les rayons de la lumi\u00e8re du r\u00e9troprojecteur et de jolies formes rouges et bleues sont ainsi dessin\u00e9es sur l\u2019\u00e9cran. Mais comment \u00e7a marche\u00a0? Ce n\u2019est pas de la magie, c\u2019est beaucoup plus simple\u00a0! Ces couronnes en g\u00e9latine rouge et bleue, sont de fines feuilles plastiques transparentes et color\u00e9es, qui une fois plac\u00e9es devant une source de lumi\u00e8re, colorent ses faisceaux. Ces deux notions scientifiques, ces \u00e9l\u00e8ves les voient au quotidien mais elles ont beaucoup plus de sens lorsqu\u2019il il s\u2019agit d\u2019un jeu de r\u00f4le entre une princesse \u00e0 couronne rouge et un roi \u00e0 couronne bleue.<\/p>\n<p style=\"text-align: justify;\">&#8230;<\/p>\n<p style=\"text-align: justify;\">Atelier du 28 mars 2014.<\/p>\n<p style=\"text-align: justify;\">&#8230;<\/p>\n<p style=\"text-align: justify;\">R\u00e9daction : Emmanuelle B\u00e9zi\u00e8res &amp; Gina Di Orio<\/p>\n<div id='gallery-1' class='gallery galleryid-321 gallery-columns-3 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=338'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_48-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=336'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_57-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_57-150x150.jpg 150w, https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_57-300x300.jpg 300w, https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_57.jpg 806w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=335'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_58-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=334'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_73-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=333'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_61-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=332'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_65-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_65-150x150.jpg 150w, https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_65-300x300.jpg 300w, https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_65.jpg 806w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=331'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_71-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=330'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_67-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/www.athenor.com\/art-et-sciences\/?attachment_id=329'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/www.athenor.com\/art-et-sciences\/wp-content\/uploads\/2014\/03\/ES_C_140228_img_62-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n<p style=\"text-align: justify;\">\n","protected":false},"excerpt":{"rendered":"<p>Tout se d\u00e9roule derri\u00e8re le \u00ab\u00a0ciel blanc\u00a0\u00bb. C\u2019est comme cela qu\u2019ils l\u2019appellent, cet \u00e9cran fabriqu\u00e9 \u00e0 partir d\u2019un cadre en bois sur lequel est tendu un grand drap blanc. C\u2019est tout de suite plus po\u00e9tique avec des enfants\u00a0! Mais un ciel blanc sans soleil ce n\u2019est pas tr\u00e8s joyeux. Un r\u00e9troprojecteur s\u2019allume au fond de &hellip; <a href=\"https:\/\/www.athenor.com\/art-et-sciences\/?p=321\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de <span class=\"screen-reader-text\">\u00c0 Jean Zay : de l\u2019opaque \u00e0 la transparence<\/span><\/span>&nbsp;<span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":337,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[63],"tags":[3,4,49],"_links":{"self":[{"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=\/wp\/v2\/posts\/321"}],"collection":[{"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=321"}],"version-history":[{"count":5,"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions"}],"predecessor-version":[{"id":328,"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions\/328"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=\/wp\/v2\/media\/337"}],"wp:attachment":[{"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.athenor.com\/art-et-sciences\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}