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En allant \u00e0 Vilnius, le 25\/9\/06… En regardant par le hublot l’ombre de l’avion sur les nuages situ\u00e9s plus bas. Un bel exemple de r\u00e9trodiffusion exalt\u00e9e (enhanced backscattering).<\/p>\n Pour les non sp\u00e9cialistes: La diffusion est exacerb\u00e9e dans la direction oppos\u00e9e \u00e0 la lumi\u00e8re incidente: les nuages diffusent plus de lumi\u00e8re dans la direction qui renvoie \u00ab\u00a0vers le soleil\u00a0\u00bb. C’est un effet d’interf\u00e9rences constructives, d’o\u00f9 le nom aussi utilis\u00e9 de r\u00e9trodiffusion coh\u00e9rente<\/a>. S’y ajoutent quelques effets color\u00e9s dus \u00e0 la diffraction par les gouttelettes d’eau, comme on peut le voir autour d’un lampadaire dans le brouillard, ou peut-\u00eatre aussi \u00e0 la r\u00e9fraction, comme dans l’arc-en-ciel.<\/p>\n Devinez quelle \u00e9tait notre place dans l’avion!<\/p>\n","protected":false},"excerpt":{"rendered":" Ces images sont prot\u00e9g\u00e9es. Voir les conditions en cliquant sur l’ic\u00f4ne suivante: En allant \u00e0 Vilnius, le 25\/9\/06… En regardant par le hublot l’ombre de l’avion sur les nuages situ\u00e9s plus bas. Un bel exemple de r\u00e9trodiffusion exalt\u00e9e (enhanced backscattering). Pour les non sp\u00e9cialistes: La diffusion est exacerb\u00e9e dans la direction oppos\u00e9e \u00e0 la lumi\u00e8re […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[11,2],"tags":[],"class_list":["post-12","post","type-post","status-publish","format-standard","hentry","category-brica_science","category-news"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p4nbll-c","_links":{"self":[{"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/posts\/12","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/comments?post=12"}],"version-history":[{"count":3,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/posts\/12\/revisions"}],"predecessor-version":[{"id":515,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/posts\/12\/revisions\/515"}],"wp:attachment":[{"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/media?parent=12"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/categories?post=12"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tayeb.fr\/wordpress\/wp-json\/wp\/v2\/tags?post=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"http:\/\/tayeb.fr\/wordpress\/wp-content\/img_1913c_compressee.jpg\")
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