{"id":489,"date":"2010-11-25T10:41:00","date_gmt":"2010-11-25T13:41:00","guid":{"rendered":"http:\/\/scienceblogs.com.br\/hypercubic\/2010\/11\/faster-than-light\/"},"modified":"2010-11-25T10:41:00","modified_gmt":"2010-11-25T13:41:00","slug":"faster-than-light","status":"publish","type":"post","link":"https:\/\/www.blogs.unicamp.br\/hypercubic\/2010\/11\/faster-than-light\/","title":{"rendered":"&#062;Faster-than-light"},"content":{"rendered":"<p>&gt;<\/p>\n<div align=\"justify\">A pressa \u00e9 inimiga da perfei\u00e7\u00e3o. O entusiasmo, tamb\u00e9m. Quando a velocidade da luz come\u00e7ou a ser medida, no fim do s\u00e9culo XIX, n\u00e3o faltavam coment\u00e1rios entusi\u00e1sticos nas jovens revistas de divulga\u00e7\u00e3o cient\u00edfica, como a francesa <i>La Science Populaire<\/i>:<\/div>\n<blockquote>\n<div align=\"justify\"><span style=\"font-family: Georgia\">A luz cruza o espa\u00e7o com a prodigiosa velocidade de 6.000 l\u00e9guas por segundo. (<i>La Science Populaire<\/i>, Abril de 1881)<\/span><\/div>\n<\/blockquote>\n<div align=\"justify\">Seis mil l\u00e9guas luminosas? Isso d\u00e1 cerca de 33.336 km\/s, o que \u00e9 pouco mais de 10% do valor atualmente aceito para a velocidade da luz (299.792 km\/s). Obviamente, o erro n\u00e3o estava na velha l\u00e9gua e foi corrigido de maneira mais ou menos po\u00e9tica:<\/div>\n<blockquote>\n<div align=\"justify\"><span style=\"font-family: Georgia\">Um erro tipogr\u00e1fico caiu em nosso \u00faltimo n\u00famero e \u00e9 importante corrigi-lo: a velocidade da luz \u00e9 de 76.000 l\u00e9guas por hora \u2014 n\u00e3o 6.000. (<i>LSP<\/i>, Maio de 1881)<\/span><\/div>\n<\/blockquote>\n<div align=\"justify\">Opa! 76.000 l\u00e9guas d\u00e1 422.256 quil\u00f4metros. N\u00e3o, esse valor 40% acima do que conhecemos hoje n\u00e3o \u00e9 um erro, por causa da falta de precis\u00e3o dos equipamentos da \u00e9poca. Al\u00e9m disso, previa-se um valor de <b><i>c<\/i><\/b> maior do que se foi verificado realmente. Mas h\u00e1 outro erro na errata acima: dessa vez o valor foi apresentado corretamente, mas em <i>l\u00e9guas por hora<\/i>! <\/div>\n<div align=\"justify\"><\/div>\n<div align=\"justify\">Isso n\u00e3o passou despercebido e tr\u00eas meses depois, sem muito entusiasmo, a<i> Le Science Populaire<\/i> finalmente informou o valor correto da velocidade da luz:<\/div>\n<blockquote>\n<div align=\"justify\"><span style=\"font-family: Georgia\">Uma nota corrigindo um erro apareceu em nosso n\u00famero 68 indicava que a velocidade da luz \u00e9 de 76.000 l\u00e9guas por hora. Nossos leitores corrigiram esse novo erro: a velocidade da luz \u00e9 aproximadamente 76.000 l\u00e9guas por segundo. (<i>LSP<\/i>, Junho de 1881)<\/span><\/div>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>&gt; A pressa \u00e9 inimiga da perfei\u00e7\u00e3o. O entusiasmo, tamb\u00e9m. Quando a velocidade da luz come\u00e7ou a ser medida, no fim do s\u00e9culo XIX, n\u00e3o faltavam coment\u00e1rios entusi\u00e1sticos nas jovens revistas de divulga\u00e7\u00e3o cient\u00edfica, como a francesa La Science Populaire: A luz cruza o espa\u00e7o com a prodigiosa velocidade de 6.000 l\u00e9guas por segundo. (La [&hellip;]<\/p>\n","protected":false},"author":486,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"material-hide-sections":[],"pgc_sgb_lightbox_settings":"","_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"categories":[25,53,115,131,188,238],"tags":[],"class_list":["post-489","post","type-post","status-publish","format-standard","hentry","category-astronomia","category-ciencia","category-fail","category-fisica","category-jornalismo","category-numeros"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>&#062;Faster-than-light - hypercubic<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.blogs.unicamp.br\/hypercubic\/2010\/11\/faster-than-light\/\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Renato Pincelli\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.blogs.unicamp.br\\\/hypercubic\\\/2010\\\/11\\\/faster-than-light\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.blogs.unicamp.br\\\/hypercubic\\\/2010\\\/11\\\/faster-than-light\\\/\"},\"author\":{\"name\":\"Renato Pincelli\",\"@id\":\"https:\\\/\\\/www.blogs.unicamp.br\\\/hypercubic\\\/#\\\/schema\\\/person\\\/c7be1e2811d061a75d3b4f4960eb53bd\"},\"headline\":\"&#062;Faster-than-light\",\"datePublished\":\"2010-11-25T13:41:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.blogs.unicamp.br\\\/hypercubic\\\/2010\\\/11\\\/faster-than-light\\\/\"},\"wordCount\":273,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.blogs.unicamp.br\\\/hypercubic\\\/#organization\"},\"articleSection\":[\"astronomia\",\"ci\u00eancia\",\"FAIL\",\"f\u00edsica\",\"jornalismo\",\"n\u00fameros\"],\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.blogs.unicamp.br\\\/hypercubic\\\/2010\\\/11\\\/faster-than-light\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.blogs.unicamp.br\\\/hypercubic\\\/2010\\\/11\\\/faster-than-light\\\/\",\"url\":\"https:\\\/\\\/www.blogs.unicamp.br\\\/hypercubic\\\/2010\\\/11\\\/faster-than-light\\\/\",\"name\":\"&#062;Faster-than-light - 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