![\"](\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/1f449.svg\")
Exercice :<\/p>\nTitre du cours : Ondes et Mati\u00e8res – Niveau Terminale <\/p>\n
I. Points importants du cours :<\/p>\n
1. Les ondes sont des perturbations qui se propagent dans l’espace ou dans la mati\u00e8re.<\/p>\n
2. Les ondes peuvent \u00eatre class\u00e9es en deux cat\u00e9gories : les ondes m\u00e9caniques (ondes sonores, vagues \u00e0 la surface de l’eau) qui n\u00e9cessitent un milieu de propagation; et les ondes \u00e9lectromagn\u00e9tiques (lumi\u00e8re, rayons X) qui peuvent se propager dans le vide.<\/p>\n
3. La vitesse de propagation d\u2019une onde d\u00e9pend du milieu dans lequel elle se propage.<\/p>\n
Exercice :<\/p>\n
Question 1 : Que sont les ondes ? Expliquez bri\u00e8vement ce que vous comprenez par cette notion.<\/p>\n
Question 2: Comment classifie-t-on g\u00e9n\u00e9ralement les ondes ? Donnez deux exemples pour chaque type.<\/p>\n
Question 3: Qu’est-ce qui influence la vitesse avec laquelle une onde se propage ?<\/p>\n
![\"](\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/1f31f.svg\")
Prenez votre temps pour r\u00e9fl\u00e9chir \u00e0 ces questions avant d’\u00e9crire vos r\u00e9ponses. Soyez aussi pr\u00e9cis que possible et n’oubliez pas d’inclure des exemples pour appuyer vos points.<\/p>\n
![\"\u23f0\"](\"https:\/\/s.w.org\/images\/core\/emoji\/14.0.0\/svg\/23f0.svg\")
Temps estim\u00e9 pour cet exercice : entre 5 et 10 minutes<\/p>\n
R\u00e9ponses aux questions:<\/p>\n
1. Les ondes sont des perturbations ou vibrations qui transportent de l\u2019\u00e9nergie d\u2019un point \u00e0 un autre sans d\u00e9placement net de mati\u00e8re.<\/p>\n
2. On distingue principalement deux types d’ondes:
– Les ondes m\u00e9caniques comme les sonsvagues en mer etc.qui ont besoin d’un milieu (solideliquide ou gaz) pour leur propagation.
– Les ondes \u00e9lectromagn\u00e9tiques comme la lumi\u00e8re visiblerayons X etc.elles n’ont pas besoin de milieu sp\u00e9cifique pour leur propagation puisqu’elles peuvent m\u00eame voyager \u00e0 travers le vide spatial.<\/p>\n
3.The speed at which a wave propagates depends primarily upon the medium through which it moves \u2013 for example sound waves travel faster in water than air because water is denser than air.<\/p>\n
Cet exercice est adapt\u00e9 aux \u00e9l\u00e8ves car il reprend non seulement les principaux concepts abord\u00e9s lors du cours sur \u00ab\u00a0Ondes et Mati\u00e8res\u00a0\u00bbmais encourage \u00e9galement une compr\u00e9hension plus profonde par l\u2019\u00e9laboration des d\u00e9finitions avec leurs propres mots ainsi qu\u2019en donnant des exemples concrets ce rendant l\u2019exercice dynamique est enrichissant !<\/p>\n","protected":false},"excerpt":{"rendered":"
Titre du cours : Ondes et Mati\u00e8res – Niveau Terminale I. Points importants du cours : 1. Les ondes sont des perturbations qui se propagent dans l’espace ou dans la mati\u00e8re. 2. Les ondes peuvent \u00eatre class\u00e9es en deux cat\u00e9gories : les ondes m\u00e9caniques (ondes sonores, vagues \u00e0 la surface de l’eau) qui n\u00e9cessitent un […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[55,8,5,4,318,1],"tags":[],"class_list":["post-8654","post","type-post","status-publish","format-standard","hentry","category-1ere","category-sciences","category-niveaux","category-matieres","category-pas-dadaptation-particuliere","category-exercices-pedagogiques-imprimables-et-gratuits"],"_links":{"self":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8654","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=8654"}],"version-history":[{"count":1,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8654\/revisions"}],"predecessor-version":[{"id":9579,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/posts\/8654\/revisions\/9579"}],"wp:attachment":[{"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/media?parent=8654"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/categories?post=8654"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exos.education\/fr\/wp-json\/wp\/v2\/tags?post=8654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}