{"id":438,"date":"2017-12-12T08:28:59","date_gmt":"2017-12-12T11:28:59","guid":{"rendered":"https:\/\/museuweg.net\/blog\/?p=438"},"modified":"2026-02-09T15:45:03","modified_gmt":"2026-02-09T18:45:03","slug":"o-som-nao-se-propaga-no-espaco","status":"publish","type":"post","link":"https:\/\/museuweg.net\/blog\/o-som-nao-se-propaga-no-espaco\/","title":{"rendered":"Por que o som n\u00e3o se propaga no espa\u00e7o?"},"content":{"rendered":"

Voc\u00ea j\u00e1 ouviu algu\u00e9m dizer que se houvesse uma explos\u00e3o no espa\u00e7o ela seria silenciosa? Pois \u00e9, o som n\u00e3o se propaga no espa\u00e7o. E voc\u00ea sabe por qu\u00ea? Vamos relembrar o que s\u00e3o as ondas sonoras para descobrir.<\/p>\n

De forma resumida, uma onda \u00e9 uma oscila\u00e7\u00e3o ou perturba\u00e7\u00e3o que se propaga no espa\u00e7o, mas sem transporte de mat\u00e9ria. S\u00f3 que nem todas as ondas s\u00e3o iguais, elas podem ser do tipo mec\u00e2nica ou eletromagn\u00e9tica.<\/p>\n

\"ondas<\/a><\/p>\n

Ondas mec\u00e2nicas<\/strong><\/p>\n

As ondas mec\u00e2nicas precisam de um meio de propaga\u00e7\u00e3o material, ou seja, precisam de um s\u00f3lido, l\u00edquido ou g\u00e1s para se movimentar. Ondas em cordas, ondas do mar e as ondas sonoras, que s\u00e3o o nosso tema central, s\u00e3o alguns exemplos cl\u00e1ssicos.<\/p>\n

Elas se propagam mais rapidamente em s\u00f3lidos do que em l\u00edquidos. Isso porque essa propaga\u00e7\u00e3o depende fortemente da liga\u00e7\u00e3o entre as part\u00edculas que comp\u00f5em o meio, e essas liga\u00e7\u00f5es s\u00e3o mais fortes em s\u00f3lidos.<\/p>\n

Agora que descobrimos que o som depende da movimenta\u00e7\u00e3o das part\u00edculas que comp\u00f5e o meio, entendemos porque as ondas sonoras n\u00e3o se propagam no v\u00e1cuo: pois n\u00e3o existem part\u00edculas para vibrar e propagar energia.
\nMas e o outro tipo de onda, como funciona?<\/p>\n

\"ondas<\/a><\/p>\n

 <\/p>\n

Ondas eletromagn\u00e9ticas<\/strong><\/p>\n

A condi\u00e7\u00e3o das ondas eletromagn\u00e9ticas \u00e9 completamente diferente. Existe um fen\u00f4meno sensacional que quando um portador muito pequeno de carga el\u00e9trica oscila, por exemplo, gera campos el\u00e9tricos e magn\u00e9ticos ao seu redor que tamb\u00e9m oscilam.<\/p>\n

Essa oscila\u00e7\u00e3o de campos el\u00e9tricos e magn\u00e9ticos faz com que outros portadores de carga \u00e0 dist\u00e2ncia tamb\u00e9m oscilem e se propaguem como uma onda, carregando energia.<\/p>\n

Essa propaga\u00e7\u00e3o pode ocorrer em meios materiais, mas no v\u00e1cuo se propaga mais r\u00e1pido, pois quem oscila n\u00e3o s\u00e3o part\u00edculas, e sim caracter\u00edsticas do espa\u00e7o ao redor da carga. A luz, ondas de r\u00e1dio, infravermelho e ultravioleta s\u00e3o alguns casos de ondas eletromagn\u00e9ticas.<\/p>\n

Legal, n\u00e9? Agora se algu\u00e9m falar sobre ondas voc\u00ea j\u00e1 pode contribuir com algumas informa\u00e7\u00f5es extras. E se quiser aprender mais sobre eletromagnetismo e outras teorias da f\u00edsica, venha fazer uma visita ao Museu WEG. Estamos abertos de ter\u00e7a a domingo das 10h \u00e0s 18h.<\/p>\n","protected":false},"excerpt":{"rendered":"

Voc\u00ea j\u00e1 ouviu algu\u00e9m dizer que se houvesse uma explos\u00e3o no espa\u00e7o ela seria silenciosa? Pois \u00e9, o som n\u00e3o…<\/p>\n","protected":false},"author":4,"featured_media":442,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[90,88,89,86,85,87],"class_list":["post-438","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia-2","tag-campo-eletrico","tag-espaco","tag-ondas-eletromagneticas","tag-ondas-mecanicas","tag-ondas-sonoras","tag-som"],"yoast_head":"\nPor que o som n\u00e3o se propaga no espa\u00e7o? - Blog com Ci\u00eancia<\/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:\/\/museuweg.net\/blog\/o-som-nao-se-propaga-no-espaco\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Por que o som n\u00e3o se propaga no espa\u00e7o? - Blog com Ci\u00eancia\" \/>\n<meta property=\"og:description\" content=\"Voc\u00ea j\u00e1 ouviu algu\u00e9m dizer que se houvesse uma explos\u00e3o no espa\u00e7o ela seria silenciosa? 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