{"id":7907,"date":"2019-09-03T23:40:40","date_gmt":"2019-09-03T23:40:40","guid":{"rendered":"http:\/\/www.ub.edu\/paraules-fisica\/?p=7907"},"modified":"2019-09-03T23:40:40","modified_gmt":"2019-09-03T23:40:40","slug":"efecte-doppler","status":"publish","type":"post","link":"https:\/\/www.ub.edu\/paraules-fisica\/efecte-doppler\/","title":{"rendered":"Efecte Doppler"},"content":{"rendered":"<p>El noi a qui li agrada pensar que a finals d&#8217;aquest curs acabar\u00e0 la carrera fa vint minuts que pensa qu\u00e8 escriure per al concurs de microrelats de la f\u00edsica. Pensa que si escriu alguna subtilesa el missatge pot quedar imprec\u00eds o insuls. Si escriu amb ins\u00eddia sobre algun gran error de la hist\u00f2ria de la f\u00edsica quedar\u00e0 ostent\u00f3s i ell, ignorant.<\/p>\n<p>Si per contra decideix elevar alguna m\u00e0xima capital que va innovar la f\u00edsica quedar\u00e0 antic, rural. Si escriu defensant algun corrent de pensament que s\u2019allunya de l&#8217;acceptat universalment, el titllaran de fan\u00e0tic. Si decideix q\u00fcestionar la veracitat de la realitat, probablement perdr\u00e0 el sentit del rid\u00edcul. Si decideix posar-se filos\u00f2fic, entrar\u00e0 en un terreny personal i ser\u00e0 avorrit. Si escriu amb classe, ser\u00e0 un mani\u00e0tic. Si \u00e9s l\u00f2gic, un fred. Si \u00e9s po\u00e8tic, un setci\u00e8ncies. Si \u00e9s ca\u00f2tic, un boig. Si no diu res, se li llan\u00e7aran al damunt. I si \u00e9s \u00fanic, el cremaran. Es planteja si posar-hi massa \u00edmpetu o fer-ho rebaixat; si escriure-ho en passat, en subjuntiu, en llat\u00ed o en cursiva. Potser, si tria paraules massa dif\u00edcils obstruir\u00e0 la idea i semblar\u00e0 inacabat. Alhora, si intenta justificar-se i sortir a la defensa per eradicar els dubtes i la segona lectura err\u00f2nia, caminar\u00e0 en cercles i tornar\u00e0 a trepitjar les seves passes.<\/p>\n<p>Quan arriba el dia, pensa<img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-7908 size-medium\" src=\"https:\/\/www.ub.edu\/paraules-fisica\/wp-content\/uploads\/2017\/12\/Efecte-Doppler-imatge-300x200.jpg\" alt=\"Efecte Doppler\" width=\"300\" height=\"200\" \/> en com encabir-ho tot en 1905 car\u00e0cters. I cau que la xifra \u00e9s l&#8217;any del naixement d&#8217;una equaci\u00f3 i llavors li ve al cap una altra equaci\u00f3. I se li n&#8217;acut una altra. I una altra.<\/p>\n<p>Abans de sortir de casa, imprimeix el full i a m\u00e0 escriu el moviment relatiu del seu sistema de refer\u00e8ncia respecte al sistema del lector, a fi que, si el lector coneix el f\u00edsic Christian Doppler o la seva equaci\u00f3, pugui con\u00e8ixer la intenci\u00f3 original del microrelat si t\u00e9 la voluntat, tamb\u00e9, de llegir el missatge que ha em\u00e8s el noi a qui li agrada pensar que a finals d&#8217;aquest curs acabar\u00e0 la carrera.<\/p>\n","protected":false},"excerpt":{"rendered":"El noi a qui li agrada pensar que a finals d&#8217;aquest curs acabar\u00e0 la carrera fa vint minuts que pensa qu\u00e8 escriure per \n<a class=\"moretag\" href=\"https:\/\/www.ub.edu\/paraules-fisica\/efecte-doppler\/\"> [...]<\/a>","protected":false},"author":2,"featured_media":7908,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"footnotes":""},"categories":[216],"tags":[],"class_list":["post-7907","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-edicio2017"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/posts\/7907","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/comments?post=7907"}],"version-history":[{"count":8,"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/posts\/7907\/revisions"}],"predecessor-version":[{"id":7916,"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/posts\/7907\/revisions\/7916"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/media\/7908"}],"wp:attachment":[{"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/media?parent=7907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/categories?post=7907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ub.edu\/paraules-fisica\/wp-json\/wp\/v2\/tags?post=7907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}