{"id":445,"date":"2023-06-17T19:35:41","date_gmt":"2023-06-17T19:35:41","guid":{"rendered":"https:\/\/physigeek.com\/it\/onda-stazionaria\/"},"modified":"2023-06-17T19:35:41","modified_gmt":"2023-06-17T19:35:41","slug":"onda-stazionaria","status":"publish","type":"post","link":"https:\/\/physigeek.com\/it\/onda-stazionaria\/","title":{"rendered":"Onda stazionaria"},"content":{"rendered":"<p>Questo articolo spiega cosa sono le onde stazionarie in fisica. Troverai quindi l&#8217;equazione delle onde stazionarie, quali sono le caratteristiche delle onde stazionarie e, inoltre, quali sono i diversi tipi di onde stazionarie. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%C2%BFQue-es-una-onda-estacionaria\"><\/span> Cos&#8217;\u00e8 un&#8217;onda stazionaria?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Un&#8217;onda <strong>stazionaria<\/strong> \u00e8 un disturbo oscillatorio i cui picchi oscillano verticalmente ma non avanzano longitudinalmente. Le onde stazionarie sono il risultato dell&#8217;interferenza tra due o pi\u00f9 onde, che consiste nella sovrapposizione di onde aventi le stesse caratteristiche ma che si muovono in direzioni opposte.<\/p>\n<p> Nella maggior parte dei casi, le onde stazionarie sono causate dal fenomeno fisico della risonanza, in modo tale che si verifica un&#8217;interferenza onda-onda tra un&#8217;onda e la sua onda riflessa in un mezzo risonatore.<\/p>\n<p> Ad esempio, quando attacchiamo una corda elastica ad un muro ad un&#8217;estremit\u00e0 e facciamo vibrare la corda, si produce un&#8217;onda stazionaria. La corda oscilla e le vibrazioni si riflettono sull&#8217;estremit\u00e0 fissa della corda, quindi le due onde si sovrappongono e si forma un&#8217;onda stazionaria. <\/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 stazionaria\" class=\"wp-image-8880\"><\/figure>\n<p> Il grafico sopra mostra un&#8217;onda stazionaria (onda rossa) insieme alle onde che si sovrappongono per formare l&#8217;onda stazionaria (onde verdi e blu). Come puoi vedere, l&#8217;onda verde si muove verso destra, l&#8217;onda blu si muove verso sinistra e, viceversa, l&#8217;onda stazionaria non si muove orizzontalmente ma vibra solo verticalmente.<\/p>\n<p> Le onde stazionarie furono descritte per la prima volta nel 1831 dal fisico inglese Michael Faraday. Tuttavia, il nome &#8220;onda stazionaria&#8221; fu coniato nel 1860 dal fisico tedesco Franz Melde. <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ecuacion-de-una-onda-estacionaria\"><\/span> Equazione di un&#8217;onda stazionaria<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> L&#8217;equazione per una condizione stazionaria \u00e8 il doppio dell&#8217;ampiezza delle onde originali per il prodotto del seno del numero d&#8217;onda per l&#8217;allungamento e il coseno della frequenza angolare per il tempo. Quindi <strong>l&#8217;equazione per un&#8217;onda stazionaria \u00e8 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\"> Oro: <\/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> \u00e8 l&#8217;allungamento del punto studiato dell&#8217;onda stazionaria. <\/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> \u00e8 l&#8217;ampiezza delle onde originali. <\/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> \u00e8 il numero d&#8217;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> \u00e8 la posizione del punto studiato dell&#8217;onda stazionaria. <\/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> \u00e8 la frequenza angolare o di pulsazione. <\/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> \u00e8 il momento del tempo.<\/span><\/li>\n<\/ul>\n<p> <strong>Nota:<\/strong> esistono diversi modi per esprimere l&#8217;equazione delle onde stazionarie, quindi a seconda del libro potresti trovare un&#8217;equazione leggermente diversa. Tuttavia, in fisica, l\u2019equazione delle onde stazionarie pi\u00f9 utilizzata \u00e8 quella presentata in questo articolo.<\/p>\n<p> Si noti che il numero d&#8217;onda e la frequenza angolare di un&#8217;onda stazionaria vengono calcolati utilizzando le seguenti formule:<\/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\"> Oro: <\/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> \u00e8 il numero d&#8217;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> \u00e8 la lunghezza d&#8217;onda, cio\u00e8 la distanza tra due punti equivalenti dell&#8217;onda stazionaria. <\/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> \u00e8 la frequenza angolare o di pulsazione. <\/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> \u00e8 il periodo definito come il tempo che intercorre tra il momento in cui l&#8217;onda passa attraverso un punto e il momento in cui passa nuovamente attraverso un punto 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> \u00e8 la frequenza, ovvero il numero di oscillazioni dell&#8217;onda nell&#8217;unit\u00e0 di 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>Guarda la dimostrazione dell&#8217;equazione di un&#8217;onda stazionaria<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"> Date due onde di propagazione definite dalle seguenti equazioni:<\/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\"> L&#8217;onda stazionaria \u00e8 la somma delle due onde oscillatorie, quindi l&#8217;equazione dell&#8217;onda stazionaria sar\u00e0 la somma delle due equazioni precedenti:<\/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\"> Applicheremo quindi le seguenti formule trigonometriche: <\/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\"> Quindi, applicando le precedenti formule trigonometriche arriviamo all\u2019equazione delle onde stazionarie: <\/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> Nodi e antinodi di un&#8217;onda stazionaria<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Qualsiasi onda stazionaria \u00e8 costituita da nodi e antinodi, definiti come segue:<\/p>\n<ul style=\"color:#4fd12f; font-weight: bold;\">\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Nodi<\/strong> : sono i punti dell&#8217;onda stazionaria il cui allungamento \u00e8 minimo (y=0). Questi punti sono completamente stazionari, poich\u00e9 non si muovono n\u00e9 orizzontalmente n\u00e9 verticalmente.<\/span><\/li>\n<li style=\"margin-bottom:20px\"> <span style=\"color:#101010;font-weight: normal;\"><strong>Pance (o pance)<\/strong> : sono i punti dell&#8217;onda stazionaria il cui allungamento \u00e8 massimo (y = 2A oppure y = -2A). Questi punti oscillano verticalmente dall&#8217;allungamento 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=\"Nodi e antinodi di un'onda stazionaria\" 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> Onde stazionarie con entrambe le estremit\u00e0 fisse<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Quando <strong>le onde stazionarie vengono generate con entrambe le estremit\u00e0 fisse,<\/strong> significa che le estremit\u00e0 dell&#8217;onda sono nodi. Questo tipo di onde stazionarie viene effettuato in tubi chiusi su entrambi i lati o mediante corde vibranti fissate alle estremit\u00e0.<\/p>\n<p> Ad esempio, quando facciamo vibrare le corde di una chitarra, generiamo onde stazionarie le cui due estremit\u00e0 sono fisse.<\/p>\n<p> In questo caso, la lunghezza d&#8217;onda e la frequenza dell&#8217;onda stazionaria sono definite dalle seguenti formule:<\/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\"> Oro: <\/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> \u00e8 la lunghezza d&#8217;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> \u00e8 la lunghezza della corda. <\/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> \u00e8 il numero armonico (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> \u00e8 la frequenza naturale o armonica. <\/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> \u00e8 la velocit\u00e0 di propagazione delle onde. <\/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=\"armoniche delle onde stazionarie con entrambe le estremit\u00e0 fisse.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> Come puoi vedere nell&#8217;immagine sopra, il numero di antinodi e il numero di nodi dipendono dal numero armonico. Il numero di antinodi di un&#8217;onda stazionaria con entrambe le estremit\u00e0 fisse \u00e8 equivalente al numero armonico, mentre il numero di nodi \u00e8 il numero armonico pi\u00f9 uno. <\/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> Onde stazionarie con entrambe le estremit\u00e0 libere<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> Infine, <strong>le onde stazionarie possono anche avere entrambe le estremit\u00e0 libere<\/strong> , in modo che entrambe le estremit\u00e0 dell&#8217;onda stazionaria siano antinodi.<\/p>\n<p> Questi tipi di onde stazionarie vengono generate in molti strumenti a fiato perch\u00e9 entrambe le estremit\u00e0 sono aperte.<\/p>\n<p> La lunghezza d&#8217;onda e la frequenza di un&#8217;onda stazionaria con entrambe le estremit\u00e0 aperte vengono calcolate utilizzando le seguenti formule:<\/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\"> Oro: <\/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> \u00e8 la lunghezza d&#8217;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> \u00e8 la lunghezza della corda. <\/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> \u00e8 il numero armonico (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> \u00e8 la frequenza naturale o armonica. <\/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> \u00e8 la velocit\u00e0 di propagazione dell&#8217;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=\"onde stazionarie con entrambe le estremit\u00e0 libere\" 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 guardi l&#8217;immagine sopra, questi tipi di onde stazionarie hanno tanti nodi quanto il numero armonico. Al contrario, il numero di antinodi di questa classe di onde stazionarie \u00e8 il numero armonico pi\u00f9 uno. <\/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>Onde stazionarie con un&#8217;estremit\u00e0 fissa e una estremit\u00e0 libera<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p> <strong>Quando l&#8217;onda si propaga in un mezzo in cui un&#8217;estremit\u00e0 \u00e8 fissa e l&#8217;altra estremit\u00e0 \u00e8 libera<\/strong> , ci\u00f2 implica che un&#8217;estremit\u00e0 dell&#8217;onda sar\u00e0 un nodo e l&#8217;altra estremit\u00e0 dell&#8217;onda sar\u00e0 un antinodo.<\/p>\n<p> Questi tipi di onde stazionarie si verificano in molti strumenti musicali, ad esempio le onde generate in una tromba, un flauto o un clarinetto hanno un&#8217;estremit\u00e0 fissa, attraverso la quale il musicista soffia, e un&#8217;altra estremit\u00e0 libera, attraverso la quale il musicista soffia. Lo strumento.<\/p>\n<p> In questo caso, la lunghezza e la frequenza dell&#8217;onda stazionaria possono essere calcolate con le seguenti formule:<\/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\"> Oro: <\/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> \u00e8 la lunghezza d&#8217;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> \u00e8 la lunghezza della corda. <\/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> \u00e8 il parametro che determina il numero armonico (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> \u00e8 la frequenza naturale o armonica. <\/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> \u00e8 la velocit\u00e0 di propagazione dell&#8217;onda.<\/span><\/li>\n<\/ul>\n<p> <strong>Nota:<\/strong> tenere presente che in questo caso esistono solo armoniche dispari (1, 3, 5, 7\u2026), perch\u00e9 in questo tipo di onde stazionarie \u00e8 possibile generare solo multipli dispari della frequenza fondamentale. <\/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=\"onde stazionarie con un'estremit\u00e0 fissa e un'estremit\u00e0 libera\" 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> In questo caso l&#8217;onda stazionaria ha lo stesso numero di nodi degli antinodi. Concretamente l\u2019onda stazionaria ha tanti nodi e tanti antinodi quanto \u00e8 il valore del parametro n dell\u2019armonica: <\/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>Questo articolo spiega cosa sono le onde stazionarie in fisica. Troverai quindi l&#8217;equazione delle onde stazionarie, quali sono le caratteristiche delle onde stazionarie e, inoltre, quali sono i diversi tipi di onde stazionarie. Cos&#8217;\u00e8 un&#8217;onda stazionaria? Un&#8217;onda stazionaria \u00e8 un disturbo oscillatorio i cui picchi oscillano verticalmente ma non avanzano longitudinalmente. Le onde stazionarie sono &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/physigeek.com\/it\/onda-stazionaria\/\"> <span class=\"screen-reader-text\">Onda stazionaria<\/span> Leggi altro &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 is optimized with the Yoast SEO plugin v21.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u25b7 Onde stazionarie<\/title>\n<meta name=\"description\" content=\"Qui troverai cosa sono le onde stazionarie, le loro caratteristiche, l&#039;equazione delle onde stazionarie e i tipi di onde stazionarie.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/physigeek.com\/it\/onda-stazionaria\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u25b7 Onde stazionarie\" \/>\n<meta property=\"og:description\" content=\"Qui troverai cosa sono le onde stazionarie, le loro caratteristiche, l&#039;equazione delle onde stazionarie e i tipi di onde stazionarie.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/physigeek.com\/it\/onda-stazionaria\/\" \/>\n<meta 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