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Disponibil în 20 limbi" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-20" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">20 limbi</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Relaci%C3%B3_de_dispersi%C3%B3" title="Relació de dispersió – catalană" lang="ca" hreflang="ca" data-title="Relació de dispersió" data-language-autonym="Català" data-language-local-name="catalană" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Dispersionsrelation" title="Dispersionsrelation – germană" lang="de" hreflang="de" data-title="Dispersionsrelation" data-language-autonym="Deutsch" data-language-local-name="germană" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Dispersion_relation" title="Dispersion relation – engleză" lang="en" hreflang="en" data-title="Dispersion relation" data-language-autonym="English" data-language-local-name="engleză" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Relaci%C3%B3n_de_dispersi%C3%B3n" title="Relación de dispersión – spaniolă" lang="es" hreflang="es" data-title="Relación de dispersión" data-language-autonym="Español" data-language-local-name="spaniolă" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B1%D8%A7%D8%A8%D8%B7%D9%87_%D9%BE%D8%A7%D8%B4%D8%B4" title="رابطه پاشش – persană" lang="fa" hreflang="fa" data-title="رابطه پاشش" data-language-autonym="فارسی" data-language-local-name="persană" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Relation_de_dispersion" title="Relation de dispersion – franceză" lang="fr" hreflang="fr" data-title="Relation de dispersion" data-language-autonym="Français" data-language-local-name="franceză" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%99%D7%97%D7%A1_%D7%A0%D7%A4%D7%99%D7%A6%D7%94" title="יחס נפיצה – ebraică" lang="he" hreflang="he" data-title="יחס נפיצה" data-language-autonym="עברית" data-language-local-name="ebraică" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B4%D5%AB%D5%BD%D5%BA%D5%A5%D6%80%D5%BD%D5%AB%D5%A1%D5%B5%D5%AB_%D6%85%D6%80%D5%A5%D5%B6%D6%84" title="Դիսպերսիայի օրենք – armeană" lang="hy" hreflang="hy" data-title="Դիսպերսիայի օրենք" data-language-autonym="Հայերեն" data-language-local-name="armeană" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Relazione_di_dispersione" title="Relazione di dispersione – italiană" lang="it" hreflang="it" data-title="Relazione di dispersione" data-language-autonym="Italiano" data-language-local-name="italiană" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%88%86%E6%95%A3%E9%96%A2%E4%BF%82" title="分散関係 – japoneză" lang="ja" hreflang="ja" data-title="分散関係" data-language-autonym="日本語" data-language-local-name="japoneză" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%B6%84%EC%82%B0_%EA%B4%80%EA%B3%84" title="분산 관계 – coreeană" lang="ko" hreflang="ko" data-title="분산 관계" data-language-autonym="한국어" data-language-local-name="coreeană" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%94%D0%B8%D1%81%D0%BF%D0%B5%D1%80%D1%81%D0%B8%D1%8F_%D0%BC%D1%8B%D0%B9%D0%B7%D0%B0%D0%BC%D1%8B" title="Дисперсия мыйзамы – kârgâză" lang="ky" hreflang="ky" data-title="Дисперсия мыйзамы" data-language-autonym="Кыргызча" data-language-local-name="kârgâză" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Hubungan_sebaran" title="Hubungan sebaran – malaeză" lang="ms" hreflang="ms" data-title="Hubungan sebaran" data-language-autonym="Bahasa Melayu" data-language-local-name="malaeză" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Spredningsrelasjon" title="Spredningsrelasjon – norvegiană bokmål" lang="nb" hreflang="nb" data-title="Spredningsrelasjon" data-language-autonym="Norsk bokmål" data-language-local-name="norvegiană bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Dyspersja_fali" title="Dyspersja fali – poloneză" lang="pl" hreflang="pl" data-title="Dyspersja fali" data-language-autonym="Polski" data-language-local-name="poloneză" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Rela%C3%A7%C3%A3o_de_dispers%C3%A3o" title="Relação de dispersão – portugheză" lang="pt" hreflang="pt" data-title="Relação de dispersão" data-language-autonym="Português" data-language-local-name="portugheză" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD_%D0%B4%D0%B8%D1%81%D0%BF%D0%B5%D1%80%D1%81%D0%B8%D0%B8" title="Закон дисперсии – rusă" lang="ru" hreflang="ru" data-title="Закон дисперсии" data-language-autonym="Русский" data-language-local-name="rusă" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD_%D0%B4%D0%B8%D1%81%D0%BF%D0%B5%D1%80%D1%81%D1%96%D1%97" title="Закон дисперсії – ucraineană" lang="uk" hreflang="uk" data-title="Закон дисперсії" data-language-autonym="Українська" data-language-local-name="ucraineană" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Yorug%CA%BBlik_dispersiyasining_elementar_klassik_nazariyasi" title="Yorugʻlik dispersiyasining elementar klassik nazariyasi – uzbecă" lang="uz" hreflang="uz" data-title="Yorugʻlik dispersiyasining elementar klassik nazariyasi" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbecă" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%89%B2%E6%95%A3%E5%85%B3%E7%B3%BB" title="色散关系 – chineză" lang="zh" hreflang="zh" data-title="色散关系" data-language-autonym="中文" data-language-local-name="chineză" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div 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srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Light_dispersion_conceptual.gif/330px-Light_dispersion_conceptual.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Light_dispersion_conceptual.gif/440px-Light_dispersion_conceptual.gif 2x" data-file-width="700" data-file-height="435" /></a><figcaption>Fenomenul de dispersie la o prismă</figcaption></figure> <p>Sub termenul de <b>dispersie a undelor electromagnetice</b> se înțelege în <a href="/wiki/Fizic%C4%83" title="Fizică">fizică</a> o proprietate a acestora care depinde de lungimea de undă notată cu λ (litera <a href="/wiki/Greac%C4%83" class="mw-redirect" title="Greacă">greacă</a> <i>lambda</i>). Se manifestă prin devierea direcției de propagare (frângere, refracție) la suprafața care desparte 2 medii diferite de propagare. </p><p><a href="/wiki/Indice_de_refrac%C8%9Bie" title="Indice de refracție">Indicele de refracție</a> „n” depinde de lungimea de undă λ, fenomen care este exploatat mai ales în <a href="/wiki/Optic%C4%83" title="Optică">optică</a>. La substanțele transparente această dispersie este în general „normală”, ca de exemplu la <a href="/wiki/Sticl%C4%83" title="Sticlă">sticlă</a>, unde refracția luminii roșii este mai slabă decât de exemplu cea a luminii albastre (care are o lungime de undă mai mică). Acest efect este explicat prin fenomenul de absorbție a luminii. Dacă însă indicele de refracție crește prin creșterea lungimii de undă, atunci este vorba de o „deviere pozitivă”, numită și o „deviere anomală”. </p> <div class="mw-heading mw-heading2"><h2 id="Vezi_și"><span id="Vezi_.C8.99i"></span>Vezi și</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Dispersia_undelor_electromagnetice&veaction=edit&section=1" title="Modifică secțiunea: Vezi și" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Dispersia_undelor_electromagnetice&action=edit&section=1" title="Edit section's source code: Vezi și"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Dispersia_luminii" title="Dispersia luminii">Dispersia luminii</a></li></ul> <p><br /> </p> <table class="navbox" cellspacing="0" style=""> <tbody><tr> <td style="padding:2px;"> <table cellspacing="0" class="nowraplinks collapsible" style="width:100%;background:transparent;color:inherit;;"> <tbody><tr> <th style=";" colspan="2" class="navbox-title"><div style="float:left; width:6em;text-align:left;"><div class="noprint plainlinks" style="padding:0; font-size:xx-small; color:var(--color-base, #000); white-space:nowrap; ;"><span style=";;border:none;"><a href="/wiki/Format:Electromagnetism" title="Format:Electromagnetism"><span title="Vizualizare format" style=";;border:none;;">v</span></a> <span style="font-size:80%;">•</span> <a href="/w/index.php?title=Discu%C8%9Bie_Format:Electromagnetism&action=edit&redlink=1" class="new" title="Discuție Format:Electromagnetism — pagină inexistentă"><span title="Discuție format" style=";;border:none;;">d</span></a> <span style="font-size:80%;">•</span> <a class="external text" href="https://ro.wikipedia.org/w/index.php?title=Format:Electromagnetism&action=edit"><span title="Acest format se poate modifica. Folosiți butonul de previzualizare înainte de a salva." style=";;border:none;;">m</span></a></span></div></div><span class="" style="font-size: 110%;"><a href="/wiki/Electromagnetism" title="Electromagnetism">Electromagnetism</a></span> </th></tr> <tr style="height:2px;"> <td> </td></tr> <tr> <td class="navbox-group" style=";;"><a href="/wiki/Electrostatic%C4%83" title="Electrostatică">Electrostatică</a> </td> <td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-odd"> <div style="padding:0em 0.25em"> <div> <p><span style="white-space:nowrap;"><a href="/wiki/C%C3%A2mp_electric" title="Câmp electric">Câmp electric</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Electret" title="Electret">Electret</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Flux_electric" title="Flux electric">Flux electric</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Generator_electrostatic" title="Generator electrostatic">Generator electrostatic</a>  <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Izolator_(electricitate)" class="mw-redirect" title="Izolator (electricitate)">Izolator (electricitate)</a>  <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Legea_lui_Coulomb" title="Legea lui Coulomb">Legea lui Coulomb</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Moment_electric_dipolar" title="Moment electric dipolar">Moment electric dipolar</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Poten%C8%9Bial_electric" title="Potențial electric">Potențial electric</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Sarcin%C4%83_electric%C4%83" title="Sarcină electrică">Sarcină electrică</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Teorema_lui_Earnshaw" title="Teorema lui Earnshaw">Teorema lui Earnshaw</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Triboelectricitate" title="Triboelectricitate">Triboelectricitate</a></span> </p> </div></div> </td></tr> <tr style="height:2px"> <td> </td></tr> <tr> <td class="navbox-group" style=";;"><a href="/wiki/Magnetostatic%C4%83" title="Magnetostatică">Magnetostatică</a> </td> <td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-even"><div style="padding:0em 0.25em"> <div> <p><span style="white-space:nowrap;"><a href="/wiki/C%C3%A2mp_magnetic" title="Câmp magnetic">Câmp magnetic</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/C%C3%A2mp_electromagnetic" title="Câmp electromagnetic">Câmp electromagnetic</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Curent_electric" title="Curent electric">Curent electric</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Flux_magnetic" title="Flux magnetic">Flux magnetic</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Legea_Biot-Savart" title="Legea Biot-Savart">Legea Biot-Savart</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/w/index.php?title=Legea_lui_Amp%C3%A8re_(circuit)&action=edit&redlink=1" class="new" title="Legea lui Ampère (circuit) — pagină inexistentă">Legea lui Ampère (circuit)</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/w/index.php?title=Legea_lui_Amp%C3%A8re_(for%C8%9B%C4%83)&action=edit&redlink=1" class="new" title="Legea lui Ampère (forță) — pagină inexistentă">Legea lui Ampère (forță)</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Magnet" title="Magnet">Magnet</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Magnetism" title="Magnetism">Magnetism</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Moment_magnetic" title="Moment magnetic">Moment magnetic</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Intensitate_a_c%C3%A2mpului_magnetic" title="Intensitate a câmpului magnetic">Intensitate a câmpului magnetic</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Permeabilitate_magnetic%C4%83" title="Permeabilitate magnetică">Permeabilitate magnetică</a></span> </p> </div></div> </td></tr> <tr style="height:2px"> <td> </td></tr> <tr> <td class="navbox-group" style=";;"><a href="/wiki/Electrodinamic%C4%83" title="Electrodinamică">Electrodinamică</a> </td> <td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-odd"><div style="padding:0em 0.25em"> <div> <p><span style="white-space:nowrap;"><a href="/wiki/Ecua%C8%9Biile_lui_Maxwell" title="Ecuațiile lui Maxwell">Ecuațiile lui Maxwell</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Electron" title="Electron">Electron</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/For%C8%9B%C4%83_Lorentz" title="Forță Lorentz">Forță Lorentz</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Induc%C8%9Bie_electromagnetic%C4%83" title="Inducție electromagnetică">Inducție electromagnetică</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Legea_induc%C8%9Biei_electromagnetice" title="Legea inducției electromagnetice">Legea inducției electromagnetice</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Optic%C4%83_ondulatorie" title="Optică ondulatorie">Optică ondulatorie</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Sistemul_de_unit%C4%83%C8%9Bi_CGS_%C3%AEn_electromagnetism" title="Sistemul de unități CGS în electromagnetism">Sistemul de unități CGS în electromagnetism</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/w/index.php?title=Teorema_lui_Poynting&action=edit&redlink=1" class="new" title="Teorema lui Poynting — pagină inexistentă">Teorema lui Poynting</a></span> </p> </div></div> </td></tr> <tr style="height:2px"> <td> </td></tr> <tr> <td class="navbox-group" style=";;">Circuite electrice<br /><a href="/wiki/Electrotehnic%C4%83" title="Electrotehnică">Electrotehnică</a> </td> <td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-even"><div style="padding:0em 0.25em"> <div> <p><span style="white-space:nowrap;"><a href="/wiki/Bobin%C4%83" title="Bobină">Bobină</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Electromagnet" title="Electromagnet">Electromagnet</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Transformator" title="Transformator">‎Transformator</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Condensator_electric" title="Condensator electric">Condensator electric</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Bobin%C4%83_Helmholtz" title="Bobină Helmholtz">Bobină Helmholtz</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Inductan%C8%9B%C4%83" title="Inductanță">Inductanță</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Legea_lui_Lenz" title="Legea lui Lenz">Legea lui Lenz</a></span> </p> </div></div> </td></tr> <tr style="height:2px"> <td> </td></tr> <tr> <td class="navbox-group" style=";;">Unde electromagnetice<br /><a href="/wiki/Radiotehnic%C4%83" title="Radiotehnică">Radiotehnică</a> </td> <td style="text-align:left;border-left:2px solid #fdfdfd;width:100%;padding:0px;;;" class="navbox-list navbox-odd"><div style="padding:0em 0.25em"> <div> <p><span style="white-space:nowrap;"><a class="mw-selflink selflink">Dispersia undelor electromagnetice</a> <span style="font-weight:bold;">·</span> </span> <span style="white-space:nowrap;"><a href="/wiki/Radia%C8%9Bie" 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