{"id":445,"date":"2023-06-17T19:35:41","date_gmt":"2023-06-17T19:35:41","guid":{"rendered":"https:\/\/physigeek.com\/pt\/onda-parada\/"},"modified":"2023-06-17T19:35:41","modified_gmt":"2023-06-17T19:35:41","slug":"onda-parada","status":"publish","type":"post","link":"https:\/\/physigeek.com\/pt\/onda-parada\/","title":{"rendered":"Onda parada"},"content":{"rendered":"<p>Este artigo explica o que s\u00e3o ondas estacion\u00e1rias na f\u00edsica. Ent\u00e3o voc\u00ea encontrar\u00e1 a equa\u00e7\u00e3o das ondas estacion\u00e1rias, quais s\u00e3o as caracter\u00edsticas das ondas estacion\u00e1rias e, al\u00e9m disso, quais s\u00e3o os diferentes tipos de ondas estacion\u00e1rias. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%C2%BFQue-es-una-onda-estacionaria\"><\/span> O que \u00e9 uma onda estacion\u00e1ria?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Uma <strong>onda estacion\u00e1ria<\/strong> \u00e9 uma perturba\u00e7\u00e3o oscilat\u00f3ria cujos picos oscilam verticalmente, mas n\u00e3o avan\u00e7am longitudinalmente. As ondas estacion\u00e1rias s\u00e3o o resultado da interfer\u00eancia entre duas ou mais ondas, que consiste na superposi\u00e7\u00e3o de ondas com as mesmas caracter\u00edsticas, mas movendo-se em dire\u00e7\u00f5es opostas.<\/p>\n<p> Na maioria dos casos, as ondas estacion\u00e1rias s\u00e3o causadas pelo fen\u00f4meno f\u00edsico da resson\u00e2ncia, de modo que a interfer\u00eancia onda a onda ocorre entre uma onda e sua onda refletida em um meio ressonador.<\/p>\n<p> Por exemplo, quando prendemos uma corda el\u00e1stica a uma parede em uma das extremidades e vibramos a corda, uma onda estacion\u00e1ria \u00e9 produzida. A corda oscila e as vibra\u00e7\u00f5es s\u00e3o refletidas na extremidade fixa da corda, portanto as duas ondas se sobrep\u00f5em e uma onda estacion\u00e1ria \u00e9 formada. <\/p>\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"620\" height=\"265\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/interference-par-ondes-stationnaires.gif\" alt=\"onda parada\" class=\"wp-image-8880\"><\/figure>\n<p> O gr\u00e1fico acima mostra uma onda estacion\u00e1ria (onda vermelha) junto com as ondas que se sobrep\u00f5em para formar a onda estacion\u00e1ria (ondas verdes e azuis). Como voc\u00ea pode ver, a onda verde se move para a direita, a onda azul se move para a esquerda e, inversamente, a onda estacion\u00e1ria n\u00e3o se move horizontalmente, mas apenas vibra verticalmente.<\/p>\n<p> As ondas estacion\u00e1rias foram descritas pela primeira vez em 1831 pelo f\u00edsico ingl\u00eas Michael Faraday. No entanto, o nome &#8220;onda estacion\u00e1ria&#8221; foi cunhado em 1860 pelo f\u00edsico alem\u00e3o Franz Melde. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ecuacion-de-una-onda-estacionaria\"><\/span> Equa\u00e7\u00e3o de uma onda estacion\u00e1ria<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> A equa\u00e7\u00e3o para um estacion\u00e1rio \u00e9 o dobro da amplitude das ondas originais vezes o produto do seno do n\u00famero da onda vezes o alongamento e o cosseno da frequ\u00eancia angular vezes o tempo. Portanto <strong>, a equa\u00e7\u00e3o para uma onda estacion\u00e1ria \u00e9 y=2\u00b7A\u00b7sin(k\u00b7x)\u00b7cos(\u03c9\u00b7t)<\/strong> .<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-530840c920e5032693233cc82579121c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"y=2\\cdot A\\cdot \\text{sin}(k\\cdot x)\\cdot \\text{cos}(\\omega\\cdot t)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"229\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-38461fc041e953482219abf5d4cce1cb_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"y\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"9\" style=\"vertical-align: -4px;\"><\/p>\n<p> \u00e9 o alongamento do ponto estudado da onda estacion\u00e1ria. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-816b613a4f79d4bf9cb51396a9654120_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"A\" title=\"Rendered by QuickLaTeX.com\" height=\"13\" width=\"13\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a amplitude das ondas originais. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-d42bc2203d6f76ad01b27ac9acc0bee1_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"k\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"9\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o n\u00famero de onda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-7e5fbfa0bbbd9f3051cd156a0f1b5e31_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"x\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"10\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a posi\u00e7\u00e3o do ponto estudado da onda estacion\u00e1ria. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-fbffdce91996e0a17795d82e8e6996d9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\omega\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a frequ\u00eancia angular ou de pulsa\u00e7\u00e3o. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-fd9cb27edab3f0a8a249bc80cc9c6ee2_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"t\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"6\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o momento do tempo.<\/span><\/li>\n<\/ul>\n<p> <strong>Nota:<\/strong> Existem v\u00e1rias maneiras de expressar a equa\u00e7\u00e3o da onda estacion\u00e1ria, portanto, dependendo do livro, voc\u00ea poder\u00e1 encontrar uma equa\u00e7\u00e3o um pouco diferente. Por\u00e9m, em f\u00edsica, a equa\u00e7\u00e3o de onda estacion\u00e1ria mais utilizada \u00e9 a apresentada neste artigo.<\/p>\n<p> Observe que o n\u00famero de onda e a frequ\u00eancia angular de uma onda estacion\u00e1ria s\u00e3o calculados usando as seguintes f\u00f3rmulas:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-bd9a9c86ac7bfe615da6e49025b8b40f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{array}{c}k=\\cfrac{2\\pi}{\\lambda}\\\\[4ex]\\omega=\\cfrac{2\\pi}{T}=2\\pi f\\end{ tableau}\" title=\"Rendered by QuickLaTeX.com\" height=\"104\" width=\"110\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-d42bc2203d6f76ad01b27ac9acc0bee1_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"k\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"9\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o n\u00famero de onda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-8c37d2f1acb1d49f3e5e655797880475_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\lambda\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"10\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o comprimento de onda, ou seja, a dist\u00e2ncia entre dois pontos equivalentes da onda estacion\u00e1ria. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-fbffdce91996e0a17795d82e8e6996d9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\omega\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a frequ\u00eancia angular ou de pulsa\u00e7\u00e3o. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-7e093fd43ad2c244140c11afe4d4bdff_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"T\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"13\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o per\u00edodo definido como o tempo entre o momento em que a onda passa por um ponto e quando ela passa novamente por um ponto equivalente. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-f5844370b6482674a233a3063f762555_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"10\" style=\"vertical-align: -4px;\"><\/p>\n<p> \u00e9 a frequ\u00eancia, que \u00e9 o n\u00famero de oscila\u00e7\u00f5es da onda por unidade de tempo. <\/span><\/li>\n<\/ul>\n<div class=\"wp-block-otfm-box-spoiler-start otfm-sp__wrapper otfm-sp__box js-otfm-sp-box__closed otfm-sp__FFF8E1\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#FFF8E1\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"> <strong>Veja a demonstra\u00e7\u00e3o da equa\u00e7\u00e3o de uma onda estacion\u00e1ria<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"> Dadas duas ondas de propaga\u00e7\u00e3o definidas pelas seguintes equa\u00e7\u00f5es:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-da9c518dd5d8c55b8ec331431c3b4198_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{array}{c}y_1=A\\cdot \\text{sin}(k\\cdot x-\\omega\\cdot t)\\\\[3ex]y_2=A\\cdot \\text{sin}(k \\cdot x+\\omega\\cdot t)\\end{array}\" title=\"Rendered by QuickLaTeX.com\" height=\"64\" width=\"186\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> A onda estacion\u00e1ria \u00e9 a soma das duas ondas oscilat\u00f3rias, ent\u00e3o a equa\u00e7\u00e3o da onda estacion\u00e1ria ser\u00e1 a soma das duas equa\u00e7\u00f5es anteriores:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-a035d8a9e422ca3984acb2bd87f96f0b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{array}{c}y=y_1+y_2\\\\[3ex]y=A\\cdot \\text{sin}(k\\cdot x-\\omega\\cdot t)+A\\cdot \\text{ sin}(k\\cdot x+\\omega\\cdot t)\\end{array}\" title=\"Rendered by QuickLaTeX.com\" height=\"61\" width=\"353\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Aplicaremos ent\u00e3o as seguintes f\u00f3rmulas trigonom\u00e9tricas: <\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-709f860df485f9933890e923dc1318a9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle\\text{sin}(A)+\\text{sin}(B)=2\\cdot \\text{sin}\\left(\\frac{A+B}{2}\\right)\\cdot\\ texte{cos}\\left(\\frac{AB}{2}\\right)\" title=\"Rendered by QuickLaTeX.com\" height=\"43\" width=\"410\" style=\"vertical-align: -17px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-ea98f48622d6f62856d337dc490738f4_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{cos}(-A)=\\text{cos}(A)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"138\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Assim, aplicando as f\u00f3rmulas trigonom\u00e9tricas anteriores chegamos \u00e0 equa\u00e7\u00e3o das ondas estacion\u00e1rias: <\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-8137cf4db2e711b343e2ee3226bcdfe2_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{array}{c}\\displaystyle y=A\\cdot \\text{sin}(k\\cdot x-\\omega\\cdot t)+A\\cdot \\text{sin}(k\\cdot x+\\ omega\\cdot t)\\\\[4ex]\\displaystyle y=2\\cdot A\\cdot \\text{sin}\\left(\\frac{(k\\cdot x-\\omega\\cdot t)+(k\\cdot x + \\omega\\cdot t)}{2}\\right)\\cdot \\text{cos}\\left(\\frac{(k\\cdot x-\\omega\\cdot t)-(k\\cdot x+\\omega\\cdot t) }{2}\\right)\\\\[4ex]\\displaystyle y=2\\cdot A\\cdot \\text{sin}(k\\cdot x)\\cdot \\text{cos}(-\\omega\\cdot t)\\\\ [4ex]\\displaystyle y=2\\cdot A\\cdot \\text{sin}(k\\cdot x)\\cdot \\text{cos}(\\omega\\cdot t)\\end{array}\" title=\"Rendered by QuickLaTeX.com\" height=\"187\" width=\"641\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nodos-y-vientres-de-una-onda-estacionaria\"><\/span> N\u00f3s e antinodos de uma onda estacion\u00e1ria<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Qualquer onda estacion\u00e1ria \u00e9 composta por n\u00f3s e antinodos, definidos da seguinte forma:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>N\u00f3s<\/strong> : s\u00e3o os pontos da onda estacion\u00e1ria cujo alongamento \u00e9 m\u00ednimo (y=0). Esses pontos s\u00e3o completamente estacion\u00e1rios, pois n\u00e3o se movem horizontalmente nem verticalmente.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Barrigas (ou barrigas)<\/strong> : s\u00e3o os pontos da onda estacion\u00e1ria cujo alongamento \u00e9 m\u00e1ximo (y = 2A ou y = -2A). Esses pontos oscilam verticalmente do alongamento y=2A a y=-2A.<\/span> <\/li>\n<\/ul>\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/noeuds-et-ventres-dondes-stationnaires.png\" alt=\"N\u00f3s e antinodos de uma onda estacion\u00e1ria\" class=\"wp-image-8887\" width=\"601\" height=\"282\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/noeuds-et-ventres-dondes-stationnaires-300x141.png 300w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/noeuds-et-ventres-dondes-stationnaires-768x362.png 768w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/noeuds-et-ventres-dondes-stationnaires.png 927w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\"><\/figure>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ondas-estacionarias-con-ambos-extremos-fijos\"><\/span> Ondas estacion\u00e1rias com ambas as extremidades fixas<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Quando <strong>ondas estacion\u00e1rias s\u00e3o geradas com ambas as extremidades fixas,<\/strong> significa que as extremidades da onda s\u00e3o n\u00f3s. Este tipo de ondas estacion\u00e1rias \u00e9 realizada em tubos fechados em ambos os lados ou por cordas vibrat\u00f3rias fixadas nas extremidades.<\/p>\n<p> Por exemplo, quando vibramos as cordas de um viol\u00e3o, geramos ondas estacion\u00e1rias cujas duas pontas s\u00e3o fixas.<\/p>\n<p> Neste caso, o comprimento de onda e a frequ\u00eancia da onda estacion\u00e1ria s\u00e3o definidos pelas seguintes f\u00f3rmulas:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-a602b1c2e671ce2b9f7ec1702c3e91df_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{array}{c}\\lambda_n=\\cfrac{2\\cdot L}{n}\\\\[4ex]f_n=\\cfrac{v}{\\lambda_n}=\\cfrac{n\\cdot v} {2\\cdot L}\\end{array}\" title=\"Rendered by QuickLaTeX.com\" height=\"107\" width=\"123\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-8c37d2f1acb1d49f3e5e655797880475_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\lambda\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"10\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o comprimento de onda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-48d71fca322532f0abc2c4ad2cf98154_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"L\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o comprimento da string. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o n\u00famero harm\u00f4nico (n=1, 2, 3, 4\u2026). <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-f5844370b6482674a233a3063f762555_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"10\" style=\"vertical-align: -4px;\"><\/p>\n<p> \u00e9 a frequ\u00eancia natural ou harm\u00f4nica. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-796872219106704832bd95ce08640b7b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"v\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"9\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a velocidade de propaga\u00e7\u00e3o da onda. <\/span><\/li>\n<\/ul>\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/ondes-stationnaires-harmoniques-aux-deux-extremites-fixes.png\" alt=\"harm\u00f4nicos de ondas estacion\u00e1rias com ambas as extremidades fixas.png\" class=\"wp-image-8893\" width=\"435\" height=\"507\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/ondes-stationnaires-harmoniques-aux-deux-extremites-fixes-257x300.png 257w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/ondes-stationnaires-harmoniques-aux-deux-extremites-fixes-768x896.png 768w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/ondes-stationnaires-harmoniques-aux-deux-extremites-fixes.png 864w\" sizes=\"auto, (max-width: 257px) 100vw, 257px\"><\/figure>\n<p> Como voc\u00ea pode ver na imagem acima, o n\u00famero de antinodos e o n\u00famero de n\u00f3s dependem do n\u00famero harm\u00f4nico. O n\u00famero de antinodos de uma onda estacion\u00e1ria com ambas as extremidades fixas \u00e9 equivalente ao n\u00famero harm\u00f4nico, enquanto o n\u00famero de n\u00f3s \u00e9 o n\u00famero harm\u00f4nico mais um. <\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-5d6e18676743f2316cac6a5a7ad60f92_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{N\\'nombre de n\u0153uds}=n+1\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"215\" style=\"vertical-align: -2px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-a556d7447cad80f85f25ecb2806c1271_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{N\\'nombre de ventres}=n\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"190\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ondas-estacionarias-con-ambos-extremos-libres\"><\/span> Ondas estacion\u00e1rias com ambas as extremidades livres<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Finalmente, <strong>as ondas estacion\u00e1rias tamb\u00e9m podem ter ambas as extremidades livres<\/strong> , de modo que ambas as extremidades da onda estacion\u00e1ria s\u00e3o antinodos.<\/p>\n<p> Esses tipos de ondas estacion\u00e1rias s\u00e3o gerados em muitos instrumentos de sopro porque ambas as extremidades deles est\u00e3o abertas.<\/p>\n<p> O comprimento de onda e a frequ\u00eancia de uma onda estacion\u00e1ria com ambas as extremidades abertas s\u00e3o calculados usando as seguintes f\u00f3rmulas:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-cacd0cbaa519db536382349834eb0142_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{array}{c}\\lambda_{n}=\\cfrac{2\\cdot L}{n}\\\\[4ex]f_{n}=\\cfrac{v}{\\lambda_{n}} =\\cfrac{n\\cdot v}{2\\cdot L}\\end{array}\" title=\"Rendered by QuickLaTeX.com\" height=\"107\" width=\"123\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-8c37d2f1acb1d49f3e5e655797880475_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\lambda\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"10\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o comprimento de onda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-48d71fca322532f0abc2c4ad2cf98154_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"L\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o comprimento da string. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o n\u00famero harm\u00f4nico (n=1, 2, 3, 4\u2026). <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-f5844370b6482674a233a3063f762555_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"10\" style=\"vertical-align: -4px;\"><\/p>\n<p> \u00e9 a frequ\u00eancia natural ou harm\u00f4nica. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-796872219106704832bd95ce08640b7b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"v\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"9\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a velocidade de propaga\u00e7\u00e3o da onda. <\/span><\/li>\n<\/ul>\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/harmoniques-ondes-stationnaires-deux-extremes-libres.png\" alt=\"ondas estacion\u00e1rias com ambas as extremidades livres\" class=\"wp-image-9037\" width=\"435\" height=\"540\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/harmoniques-ondes-stationnaires-deux-extremes-libres-242x300.png 242w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/harmoniques-ondes-stationnaires-deux-extremes-libres-825x1024.png 825w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/harmoniques-ondes-stationnaires-deux-extremes-libres-768x953.png 768w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/harmoniques-ondes-stationnaires-deux-extremes-libres.png 868w\" sizes=\"auto, (max-width: 242px) 100vw, 242px\"><\/figure>\n<p> Se voc\u00ea olhar a imagem acima, ver\u00e1 que esses tipos de ondas estacion\u00e1rias t\u00eam tantos n\u00f3s quanto o n\u00famero harm\u00f4nico. Em contraste, o n\u00famero de antinodos desta classe de ondas estacion\u00e1rias \u00e9 o n\u00famero harm\u00f4nico mais um. <\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-d7477820f4cd9c20e842ca77b0bcfd31_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{N\\'nombre de n\u0153uds}=n\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"185\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-a4431d38c9c7f59a49b69b29d3536f93_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{N\\'nombre de ventres}=n+1\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"219\" style=\"vertical-align: -2px;\"><\/p>\n<\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ondas-estacionarias-con-un-extremo-fijo-y-un-extremo-libre\"><\/span>Ondas estacion\u00e1rias com uma extremidade fixa e uma extremidade livre<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> <strong>Quando a onda se propaga num meio em que uma extremidade \u00e9 fixa e a outra livre<\/strong> , isso implica que uma extremidade da onda ser\u00e1 um n\u00f3 e a outra extremidade da onda ser\u00e1 um antin\u00f3.<\/p>\n<p> Estes tipos de ondas estacion\u00e1rias ocorrem em muitos instrumentos musicais, por exemplo, as ondas geradas num trompete, flauta ou clarinete t\u00eam uma extremidade fixa, atrav\u00e9s da qual o m\u00fasico sopra, e outra extremidade livre, atrav\u00e9s da qual o m\u00fasico sopra. O instrumento.<\/p>\n<p> Neste caso, o comprimento e a frequ\u00eancia da onda estacion\u00e1ria podem ser calculados pelas seguintes f\u00f3rmulas:<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-79cd7218a7a133578e1c7cdf3b6b21f6_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{array}{c}\\lambda_{2n-1}=\\cfrac{4\\cdot L}{2n-1}\\\\[4ex]f_{2n-1}=\\cfrac{v}{ \\lambda_{2n-1}}=\\cfrac{v}{4\\cdot L}\\cdot (2n-1)\\end{array}\" title=\"Rendered by QuickLaTeX.com\" height=\"107\" width=\"247\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p style=\"margin-bottom:5px\"> Ouro: <\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-8c37d2f1acb1d49f3e5e655797880475_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\lambda\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"10\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o comprimento de onda. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-48d71fca322532f0abc2c4ad2cf98154_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"L\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o comprimento da string. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-ec4217f4fa5fcd92a9edceba0e708cf7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"n\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"11\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 o par\u00e2metro que determina o n\u00famero harm\u00f4nico (n=1, 2, 3, 4\u2026). <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-f5844370b6482674a233a3063f762555_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"10\" style=\"vertical-align: -4px;\"><\/p>\n<p> \u00e9 a frequ\u00eancia natural ou harm\u00f4nica. <\/span><\/li>\n<li style=\"margin-bottom:5px\"><span style=\"color:#101010;font-weight: normal;\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-796872219106704832bd95ce08640b7b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"v\" title=\"Rendered by QuickLaTeX.com\" height=\"8\" width=\"9\" style=\"vertical-align: 0px;\"><\/p>\n<p> \u00e9 a velocidade de propaga\u00e7\u00e3o da onda.<\/span><\/li>\n<\/ul>\n<p> <strong>Nota:<\/strong> tenha em mente que neste caso s\u00f3 existem harm\u00f4nicos \u00edmpares (1, 3, 5, 7\u2026), pois neste tipo de ondas estacion\u00e1rias s\u00f3 \u00e9 poss\u00edvel gerar m\u00faltiplos \u00edmpares da frequ\u00eancia fundamental. <\/p>\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/onde-stationnaire-extremite-fixe-et-extremite-libre.png\" alt=\"ondas estacion\u00e1rias com extremidade fixa e extremidade livre\" class=\"wp-image-9031\" width=\"434\" height=\"516\" srcset=\"https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/onde-stationnaire-extremite-fixe-et-extremite-libre-252x300.png 252w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/onde-stationnaire-extremite-fixe-et-extremite-libre-861x1024.png 861w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/onde-stationnaire-extremite-fixe-et-extremite-libre-768x913.png 768w, https:\/\/physigeek.com\/wp-content\/uploads\/2023\/09\/onde-stationnaire-extremite-fixe-et-extremite-libre.png 869w\" sizes=\"auto, (max-width: 252px) 100vw, 252px\"><\/figure>\n<p> Neste caso, a onda estacion\u00e1ria possui o mesmo n\u00famero de n\u00f3s que os antinodos. Concretamente, a onda estacion\u00e1ria tem tantos n\u00f3s e tantos antinodos quanto o valor do par\u00e2metro n do harm\u00f4nico: <\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-d7477820f4cd9c20e842ca77b0bcfd31_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{N\\'nombre de n\u0153uds}=n\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"185\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\">\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/physigeek.com\/wp-content\/ql-cache\/quicklatex.com-a556d7447cad80f85f25ecb2806c1271_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{N\\'nombre de ventres}=n\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"190\" style=\"vertical-align: 0px;\"><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Este artigo explica o que s\u00e3o ondas estacion\u00e1rias na f\u00edsica. Ent\u00e3o voc\u00ea encontrar\u00e1 a equa\u00e7\u00e3o das ondas estacion\u00e1rias, quais s\u00e3o as caracter\u00edsticas das ondas estacion\u00e1rias e, al\u00e9m disso, quais s\u00e3o os diferentes tipos de ondas estacion\u00e1rias. O que \u00e9 uma onda estacion\u00e1ria? Uma onda estacion\u00e1ria \u00e9 uma perturba\u00e7\u00e3o oscilat\u00f3ria cujos picos oscilam verticalmente, mas n\u00e3o &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/physigeek.com\/pt\/onda-parada\/\"> <span class=\"screen-reader-text\">Onda parada<\/span> Leia mais &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-445","post","type-post","status-publish","format-standard","hentry","category-cinematografico"],"yoast_head":"<!-- This site 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