{"id":8549,"date":"2023-09-19T16:47:00","date_gmt":"2023-09-19T15:47:00","guid":{"rendered":"https:\/\/exos.education\/fr\/exercice-sciences-la-propagation-lumiere-niveau-3eme\/"},"modified":"2023-08-21T14:54:30","modified_gmt":"2023-08-21T13:54:30","slug":"exercice-sciences-la-propagation-lumiere-niveau-3eme","status":"publish","type":"post","link":"https:\/\/exos.education\/fr\/exercice-sciences-la-propagation-lumiere-niveau-3eme\/","title":{"rendered":"Exercice Sciences La Propagation Lumi\u00e8re Niveau 3\u00e8me"},"content":{"rendered":"<p>Points importants du cours : <br \/>&#8211; La lumi\u00e8re est une onde \u00e9lectromagn\u00e9tique.<br \/>&#8211; Elle se propage dans le vide \u00e0 une vitesse constante de 3 x 10^8 m\/s.<br \/>&#8211; Dans un milieu transparent et homog\u00e8ne, la lumi\u00e8re se propage en ligne droite. C&rsquo;est ce qu&rsquo;on appelle le principe de rectilin\u00e9arit\u00e9 de la lumi\u00e8re. <\/p>\n<p>Consignment pour l&rsquo;exercice :<\/p>\n<p>Prenez votre temps pour r\u00e9pondre aux questions qui suivent. Utilisez les connaissances que nous avons d\u00e9velopp\u00e9es lors du cours.<\/p>\n<p>Exercice :<\/p>\n<p><img decoding=\"async\" draggable=false\" role=\"img\" class=\"emoji\" alt=\"1\ufe0f\u20e3\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/31-20e3.svg\"> Quelle est la nature de la lumi\u00e8re? (2 points)<br \/><img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\"2\ufe0f\u20e3\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/32-20e3.svg\"> A quelle vitesse se propage-t-elle dans le vide ? (2 points)<br \/><img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\"3\ufe0f\u20e3\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/33-20e3.svg\"> Que signifie le principe de rectilin\u00e9arit\u00e9 ? (2 points) <\/p>\n<p>R\u00e9ponses :<br \/><img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\"1\ufe0f\u20e3\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/31-20e3.svg\"> La lumi\u00e8re est une onde \u00e9lectromagn\u00e9tique.<br \/><img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\"2\ufe0f\u20e3\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/32-20e3.svg\"> Elle se propage \u00e0 une vitesse constante de 3 x 10^8 m\/s.<br \/><img decoding=\"async\" draggable=\"false\" role=\"img\" class=\"emoji\" alt=\"3\ufe0f\u20e3\" src=\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/33-20e3.svg\"> Le principe de rectilin\u00e9arit\u00e9 signifie que la lumi\u00e8re se propage en ligne droite dans un milieu transparent et homog\u00e8ne.<\/p>\n<p>Cet exercice propose des questions basiques sur la propagation de la lumi\u00e8re issus directement du cours. Il permet aux \u00e9l\u00e8ves d&rsquo;impliquer leur capacit\u00e9 \u00e0 rev\u00eatir les notions fondamentales et ainsi consolider leurs bases en physique.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Points importants du cours : &#8211; La lumi\u00e8re est une onde \u00e9lectromagn\u00e9tique.&#8211; Elle se propage dans le vide \u00e0 une vitesse constante de 3 x 10^8 m\/s.&#8211; Dans un milieu transparent et homog\u00e8ne, la lumi\u00e8re se propage en ligne droite. C&rsquo;est ce qu&rsquo;on appelle le principe de rectilin\u00e9arit\u00e9 de la lumi\u00e8re. Consignment pour l&rsquo;exercice : [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[8,5,4,53,318,1],"tags":[],"class_list":["post-8549","post","type-post","status-publish","format-standard","hentry","category-sciences","category-niveaux","category-matieres","category-3eme","category-pas-dadaptation-particuliere","category-exercices-pedagogiques-imprimables-et-gratuits"],"_links":{"self":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/comments?post=8549"}],"version-history":[{"count":0,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8549\/revisions"}],"wp:attachment":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/media?parent=8549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/categories?post=8549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/tags?post=8549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}