{"id":201,"date":"2021-05-11T01:56:39","date_gmt":"2021-05-11T04:56:39","guid":{"rendered":"https:\/\/fisica.net\/biografias\/?p=201"},"modified":"2021-05-17T18:42:02","modified_gmt":"2021-05-17T21:42:02","slug":"em-10-05-augustin-jean-fresnel","status":"publish","type":"post","link":"https:\/\/fisica.net\/biografias\/em-10-05-augustin-jean-fresnel\/","title":{"rendered":"Em 10\/05: AUGUSTIN JEAN FRESNEL"},"content":{"rendered":"\n<p><br><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" class=\"wp-image-202\" style=\"width: 1000px;\" src=\"https:\/\/fisica.net\/biografias\/wp-content\/uploads\/2021\/05\/05.10-AUSGUSTIN-JEAN-FRESNEL.jpg\" alt=\"\" srcset=\"https:\/\/fisica.net\/biografias\/wp-content\/uploads\/2021\/05\/05.10-AUSGUSTIN-JEAN-FRESNEL.jpg 1000w, https:\/\/fisica.net\/biografias\/wp-content\/uploads\/2021\/05\/05.10-AUSGUSTIN-JEAN-FRESNEL-300x300.jpg 300w, https:\/\/fisica.net\/biografias\/wp-content\/uploads\/2021\/05\/05.10-AUSGUSTIN-JEAN-FRESNEL-150x150.jpg 150w, https:\/\/fisica.net\/biografias\/wp-content\/uploads\/2021\/05\/05.10-AUSGUSTIN-JEAN-FRESNEL-768x768.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\u260510\/05\/1788 \u202014\/07\/1827<br>Engenheiro e f\u00edsico franc\u00eas nascido em Chambrais, conhecido por suas descobertas sobre os fen\u00f4menos \u00f3ticos como reflex\u00e3o, refra\u00e7\u00e3o, difra\u00e7\u00e3o e polariza\u00e7\u00e3o da luz. Estudou na Escola Central de Caen e depois entrou para a Escola Polit\u00e9cnica (1804), diplomando-se engenheiro. Foi nomeado engenheiro da administra\u00e7\u00e3o p\u00fablica (1806), por\u00e9m foi destitu\u00eddo por motivos pol\u00edticos e teve que se refugiar numa propriedade da fam\u00edlia na Normandia.<\/p>\n\n\n\n<div align=\"center\">\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<!-- Banner-728x90 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:728px;height:90px\"\n     data-ad-client=\"ca-pub-8479963969486292\"\n     data-ad-slot=\"1093331068\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n<\/div>\n\n\n\n<p>Em seu per\u00edodo de ref\u00fagio dedicou-se a experi\u00eancias sobre os fen\u00f4menos de reflex\u00e3o, refra\u00e7\u00e3o e difra\u00e7\u00e3o da luz, tornando-se especialista em pesquisas com difra\u00e7\u00e3o e polariza\u00e7\u00e3o da luz (1811) que o consagraria como um dos f\u00edsicos mais not\u00e1veis da primeira metade do s\u00e9culo XIX. Depois, por\u00e9m independentemente, de Dominique-Fran\u00e7ois-Jean Arago e Thomas Young, desenvolveu a teoria ondulat\u00f3ria da propaga\u00e7\u00e3o da luz (1815-1819), que fora formulada por Huygens (1690), apresentando \u00e0 Academia de Ci\u00eancias uma monografia sobre a difra\u00e7\u00e3o dos raios luminosos (1819), estabelecendo as no\u00e7\u00f5es b\u00e1sicas de comprimento de onda e intersec\u00e7\u00e3o de ondas.<\/p>\n\n\n\n<p>Desenvolveu um exame cr\u00edtico minucioso da teoria da luz e demonstrou que a teoria newtoniana da emiss\u00e3o n\u00e3o se adequava \u00e0s \u00faltimas descobertas. Retomou a antiga hip\u00f3tese que fora formulada pelo holand\u00eas Christiaan Huygens no s\u00e9culo XVII e defendida pelo ingl\u00eas Thomas Young, e concluiu que os fen\u00f4menos luminosos poderiam ser explicados pela hip\u00f3tese ondulat\u00f3ria. Efetuou as primeiras medi\u00e7\u00f5es de comprimento de onda el\u00e9trica, desenvolveu, matematicamente, a teoria das ondas e imaginou a constru\u00e7\u00e3o de zonas de interfer\u00eancia (1821), que seria desenvolvida posteriormente por Gustav Kirckhoff.<\/p>\n\n\n\n<p>Suas teorias foram energicamente combatidas e seus trabalhos tiveram pouca divulga\u00e7\u00e3o, por\u00e9m, quando Jean Bernard Le\u00f3nFoucault determinou experimentalmente a velocidade da luz na \u00e1gua e no ar (1850), a teoria ondulat\u00f3ria foi definitivamente confirmada. Desenvolveu, tamb\u00e9m, estudos e aperfei\u00e7oou as lentes usadas em far\u00f3is (1822). Foi professor orientador de Andr\u00e9-Marie Amp\u00e8re. Pertenceu \u00e0s Academias Francesa de Ci\u00eancias e Real, da Inglaterra, e morreu em Ville-d&#8217;Avray.<\/p>\n\n\n\n<p>ACESSE<br>https:\/\/www.fisica.net\/optica\/<br>https:\/\/www.fisica.net\/tc\/fis2g35.pdf<br>https:\/\/www.fisica.net\/optica\/Optica-Moderna.pdf<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u260510\/05\/1788 \u202014\/07\/1827Engenheiro e f\u00edsico franc\u00eas nascido em Chambrais, conhecido por suas descobertas sobre os fen\u00f4menos<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,81],"tags":[14,4,11,7,31],"class_list":["post-201","post","type-post","status-publish","format-standard","hentry","category-aniversariante","category-maio","tag-engenheiro","tag-fisico","tag-frances","tag-maio","tag-optica"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Em 10\/05: AUGUSTIN JEAN FRESNEL - 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