{"id":1599,"date":"2020-07-05T10:40:58","date_gmt":"2020-07-05T08:40:58","guid":{"rendered":"http:\/\/trabucaire.free.fr\/?p=1599"},"modified":"2026-07-24T15:03:38","modified_gmt":"2026-07-24T13:03:38","slug":"phenakistiscopes","status":"publish","type":"post","link":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/maths-pour-se-divertir\/phenakistiscopes\/","title":{"rendered":"Ph\u00e9nakistiscopes"},"content":{"rendered":"

Quand les images d\u00e9filent trop vite, tout se brouille.<\/p>\n

On peut observer ce qui se passe sur l’animation suivante en modifiant la vitesse du moins vers le plus \u00e0 l\u2019aide du curseur. J’ai fix\u00e9 ici le maximum \u00e0 (360\/11)\u00b0, nous verrons pourquoi.
\nL’impression obtenue est quelquefois troublante : alors que la vitesse augmente on a l’impression que les images tournent d’un seul coup \u00e0 l’envers, puis elles repartent dans l’autre sens, ralentissent acc\u00e9l\u00e8rent ou s’immobilisent…<\/p>\n\n\n\n\n\n\n\n\n
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Quand les images d\u00e9filent trop vite, tout se brouille. On peut observer ce qui se passe sur l’animation suivante en modifiant la vitesse du moins vers le plus \u00e0 l\u2019aide du curseur. J’ai fix\u00e9 ici le maximum \u00e0 (360\/11)\u00b0, nous verrons pourquoi. L’impression obtenue est quelquefois troublante : alors que la vitesse augmente on a … Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27,6],"tags":[47,31],"class_list":["post-1599","post","type-post","status-publish","format-standard","hentry","category-les-illusions-doptiques","category-maths-pour-se-divertir","tag-illusions","tag-maths-pour-ce-divertir"],"_links":{"self":[{"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/posts\/1599","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/comments?post=1599"}],"version-history":[{"count":0,"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/posts\/1599\/revisions"}],"wp:attachment":[{"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/media?parent=1599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/categories?post=1599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/trabucaire.pages-perso.free.fr\/index.php\/wp-json\/wp\/v2\/tags?post=1599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}