{"id":7215,"date":"2021-05-10T09:33:10","date_gmt":"2021-05-10T07:33:10","guid":{"rendered":"http:\/\/agora.xtec.cat\/ceiprellinars\/?p=7215"},"modified":"2021-05-10T22:25:43","modified_gmt":"2021-05-10T20:25:43","slug":"el-misteri-de-la-llum-que-no-es-veu","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ceiprellinars\/actualitat\/el-misteri-de-la-llum-que-no-es-veu\/","title":{"rendered":"El misteri de la llum que no es veu"},"content":{"rendered":"

Continuem desvelant els misteris d’all\u00f2 invisible, acabem amb l\u2019\u00faltim dels reptes de la MISSI\u00d3 ALBA<\/strong>, i en aquest laboratori farem per detectar la llum invisible: la llum infraroja<\/strong> i la llum ultravioleta<\/strong>. Per tal de poder detectar-les hem fet uns experiments.<\/p>\n

Primer hem comen\u00e7at per la llum infraroja, per fer aquest experiment necessitem:<\/p>\n

– Una llanterna<\/p>\n

– Un comandament a dist\u00e0ncia<\/p>\n

– Un pl\u00e0stic transparent<\/p>\n

– Un pl\u00e0stic negre<\/p>\n

– Un mirall<\/p>\n

Agafem el comandament i la llanterna al costat enfocant a la mateixa direcci\u00f3 i l\u2019observem, aqu\u00ed veurem que els nostres ulls no s\u00f3n capa\u00e7os de detectar la llum invisible del comandament per\u00f2 s\u00ed la de la llanterna. Fem el mateix per\u00f2 amb una c\u00e0mera davant de les dues llums, si ens fixem en la c\u00e0mera s\u00ed podem veure les dues llums. La llum infraroja no es veu a simple vista, per aix\u00f2 necessitem una c\u00e0mera.<\/p>\n

\"\"<\/a><\/p>\n

Despr\u00e9s veiem si totes dues llums es comporten de la mateixa forma, per aix\u00f2 les fem travessar diferents materials: un pl\u00e0stic transparent i un de negre ( bossa de basura). Tamb\u00e9 fem l\u2019experiment mirant les dues llums a trav\u00e9s d\u2019un mirall.<\/p>\n

\"\"<\/a><\/p>\n

Les dues llums es comporten d\u2019igual manera, es reflexen al mirall, poden travessar el pl\u00e0stic transparent i no es veuen a trav\u00e9s d\u2019un pl\u00e0stic negre, com vam veure a l\u2019anterior laboratori, el color negre absorbeix tota la llum.<\/p>\n

Per al segon experiment, hem vist com reacciona la llum ultravioleta. Per fer l\u2019experiment necessitem:<\/p>\n

– Unes boles sensibles a la llum ultravioleta<\/p>\n

– Crema hidratant<\/p>\n

– Crema fotoprotectora de diferent factor (30\/50)<\/p>\n

– Bossetes de pl\u00e0stic transparent<\/p>\n

\"\"<\/a><\/p>\n

Tot i que era un dia nuvolat, vam agafar els tres tipus de crema i les vam untar en les diferents boletes. Cada grup de boletes les vam guardar separades amb diferents bosses transparents etiquetades amb el nom de la crema. Una de les cremes fotoprotectores que vam fer servir estava caducada, aquest fet ens va servir per parlar sobre la import\u00e0ncia de tenir en compte la data de caducitat en les cremes protectores que fem servir, doncs passat aquell temps la protecci\u00f3 que ens ofereixen \u00e9s molt menor.<\/p>\n

\"\"<\/a> \"\"<\/a> \"\"<\/a><\/p>\n

El que va passar ens va sorprendre molt, les boletes untades amb crema hidratant van canviar totes de color, les de la crema solar caducada van canviar una mica i les altres de la crema fotoprotectora bona, no van canviar de color.<\/p>\n

Aqu\u00ed hem observat la import\u00e0ncia de protegir-nos dels rajos ultravioleta, doncs rebem igualment els rajos del sol fins i tot si fa n\u00favol!<\/p>\n","protected":false},"excerpt":{"rendered":"

Continuem desvelant els misteris d’all\u00f2 invisible, acabem amb l\u2019\u00faltim dels reptes de la MISSI\u00d3 ALBA, i en aquest laboratori farem per detectar la llum invisible: la llum infraroja i la llum ultravioleta. Per tal de poder detectar-les hem fet uns experiments. Primer hem comen\u00e7at per la llum infraroja, per fer aquest experiment necessitem: – Una […]<\/p>\n","protected":false},"author":23,"featured_media":7240,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1,27,9],"tags":[],"class_list":["post-7215","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualitat","category-escola","category-grans"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/7215","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/comments?post=7215"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/7215\/revisions"}],"predecessor-version":[{"id":7259,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/7215\/revisions\/7259"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/media\/7240"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/media?parent=7215"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/categories?post=7215"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/tags?post=7215"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}