<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="es">
		<id>https://vctrac.es/index.php?action=history&amp;feed=atom&amp;title=velocidad_de_grupo</id>
		<title>velocidad de grupo - Historial de revisiones</title>
		<link rel="self" type="application/atom+xml" href="https://vctrac.es/index.php?action=history&amp;feed=atom&amp;title=velocidad_de_grupo"/>
		<link rel="alternate" type="text/html" href="https://vctrac.es/index.php?title=velocidad_de_grupo&amp;action=history"/>
		<updated>2026-04-05T18:16:10Z</updated>
		<subtitle>Historial de revisiones para esta página en el wiki</subtitle>
		<generator>MediaWiki 1.27.0</generator>

	<entry>
		<id>https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=28746&amp;oldid=prev</id>
		<title>Elena en 18:49 3 dic 2020</title>
		<link rel="alternate" type="text/html" href="https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=28746&amp;oldid=prev"/>
				<updated>2020-12-03T18:49:29Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='es'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Revisión anterior&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revisión del 18:49 3 dic 2020&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Línea 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Línea 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=velocidad de grupo=&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=velocidad de grupo=&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula \({{\boldsymbol{v}}_{\rm{g}}} = {\nabla _{\boldsymbol{k}}}{\kern 1pt}\omega {\kern 1pt} ({\boldsymbol{k}})\), donde $\omega {\kern 1pt}({\boldsymbol{k}})$ es la relación de dispersión. Es generalmente distinta de la velocidad de fase ${{\boldsymbol{v}}_{\rm{f}}} = \left( {\omega {\kern 1pt} ({\boldsymbol{k}})/k} \right)\widehat {\boldsymbol{k}}$.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula \({{\boldsymbol{v}}_{\rm{g}}} = {\nabla _{\boldsymbol{k}}}{\kern 1pt}\omega {\kern 1pt} ({\boldsymbol{k}})\), donde $\omega {\kern 1pt}({\boldsymbol{k}})$ es la relación de dispersión. Es generalmente distinta de la velocidad de fase ${{\boldsymbol{v}}_{\rm{f}}} = \left( {\omega {\kern 1pt} ({\boldsymbol{k}})/k} \right)\widehat {\boldsymbol{k}&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;}{\kern 0.3pt&lt;/ins&gt;}$.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Elena</name></author>	</entry>

	<entry>
		<id>https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=28486&amp;oldid=prev</id>
		<title>Elena en 17:43 22 oct 2020</title>
		<link rel="alternate" type="text/html" href="https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=28486&amp;oldid=prev"/>
				<updated>2020-10-22T17:43:40Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='es'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Revisión anterior&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revisión del 17:43 22 oct 2020&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Línea 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Línea 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=velocidad de grupo=&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=velocidad de grupo=&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula \({{\&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;bf&lt;/del&gt;{v}}_{\rm{g}}} = {\nabla _{\&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;bf&lt;/del&gt;{k}}}\omega {\kern 1pt} ({\&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;bf&lt;/del&gt;{k}})\), donde $\omega {\kern 1pt}({\&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;bf&lt;/del&gt;{k}})$ es la relación de dispersión. Es generalmente distinta de la velocidad de fase ${{\&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;bf&lt;/del&gt;{v}}_{\rm{f}}} = \left( {\omega {\kern 1pt} ({\&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;bf&lt;/del&gt;{k}})/k} \right)\widehat {\&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;bf&lt;/del&gt;{k}}$.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula \({{\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;boldsymbol&lt;/ins&gt;{v}}_{\rm{g}}} = {\nabla _{\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;boldsymbol&lt;/ins&gt;{k}}&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;}{\kern 1pt&lt;/ins&gt;}\omega {\kern 1pt} ({\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;boldsymbol&lt;/ins&gt;{k}})\), donde $\omega {\kern 1pt}({\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;boldsymbol&lt;/ins&gt;{k}})$ es la relación de dispersión. Es generalmente distinta de la velocidad de fase ${{\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;boldsymbol&lt;/ins&gt;{v}}_{\rm{f}}} = \left( {\omega {\kern 1pt} ({\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;boldsymbol&lt;/ins&gt;{k}})/k} \right)\widehat {\&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;boldsymbol&lt;/ins&gt;{k}}$.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Elena</name></author>	</entry>

	<entry>
		<id>https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=27925&amp;oldid=prev</id>
		<title>Agt en 10:10 21 feb 2020</title>
		<link rel="alternate" type="text/html" href="https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=27925&amp;oldid=prev"/>
				<updated>2020-02-21T10:10:42Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='es'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Revisión anterior&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revisión del 10:10 21 feb 2020&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Línea 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Línea 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=velocidad de grupo=&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=velocidad de grupo=&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula \({{\bf{v}}_{\rm{g}}} = {\nabla _{\bf{k}}}\omega {\kern 1pt} ({\bf{k}})\), donde &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;(&lt;/del&gt;\omega {\kern 1pt} &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/del&gt;({\bf{k}})&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;\) &lt;/del&gt;es la relación de dispersión. Es generalmente distinta de la velocidad de fase &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;\(&lt;/del&gt;{{\bf{v}}_{\rm{f}}} = \left( {\omega {\kern 1pt} ({\bf{k}})/k} \right)\widehat {\bf{k}}&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;\)&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula \({{\bf{v}}_{\rm{g}}} = {\nabla _{\bf{k}}}\omega {\kern 1pt} ({\bf{k}})\), donde &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;$&lt;/ins&gt;\omega {\kern 1pt}({\bf{k}})&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;$ &lt;/ins&gt;es la relación de dispersión. Es generalmente distinta de la velocidad de fase &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;$&lt;/ins&gt;{{\bf{v}}_{\rm{f}}} = \left( {\omega {\kern 1pt} ({\bf{k}})/k} \right)\widehat {\bf{k}}&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;$&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Agt</name></author>	</entry>

	<entry>
		<id>https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=27414&amp;oldid=prev</id>
		<title>David en 15:35 21 ene 2020</title>
		<link rel="alternate" type="text/html" href="https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=27414&amp;oldid=prev"/>
				<updated>2020-01-21T15:35:34Z</updated>
		
		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;col class='diff-marker' /&gt;
				&lt;col class='diff-content' /&gt;
				&lt;tr style='vertical-align: top;' lang='es'&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;← Revisión anterior&lt;/td&gt;
				&lt;td colspan='2' style=&quot;background-color: white; color:black; text-align: center;&quot;&gt;Revisión del 15:35 21 ene 2020&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Línea 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Línea 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=velocidad de grupo=&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;&amp;#160;&lt;/td&gt;&lt;td style=&quot;background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;=velocidad de grupo=&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula ({{bf{v}}_{rm{g}}} = {nabla _{bf{k}}}omega {kern 1pt} ({bf{k}})), donde (omega {kern 1pt} ({bf{k}})) es la relación de dispersión. Es generalmente distinta de la velocidad de fase ({{bf{v}}_{rm{f}}} = left( {omega {kern 1pt} ({bf{k}})/k} right)widehat {bf{k}}).&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;({{&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;bf{v}}_{&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;rm{g}}} = {&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;nabla _{&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;bf{k}}}&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;omega {&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;kern 1pt} ({&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;bf{k}})&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;), donde (&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;omega {&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;kern 1pt} &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;({&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;bf{k}})&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;) es la relación de dispersión. Es generalmente distinta de la velocidad de fase &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;({{&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;bf{v}}_{&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;rm{f}}} = &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;left( {&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;omega {&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;kern 1pt} ({&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;bf{k}})/k} &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;right)&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;widehat {&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;bf{k}}&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;\&lt;/ins&gt;).&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>David</name></author>	</entry>

	<entry>
		<id>https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=27054&amp;oldid=prev</id>
		<title>Maintenance script: Imported from text file</title>
		<link rel="alternate" type="text/html" href="https://vctrac.es/index.php?title=velocidad_de_grupo&amp;diff=27054&amp;oldid=prev"/>
				<updated>2020-01-20T09:54:33Z</updated>
		
		<summary type="html">&lt;p&gt;Imported from text file&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Página nueva&lt;/b&gt;&lt;/p&gt;&lt;div&gt;=velocidad de grupo=&lt;br /&gt;
(''&amp;lt;span style=&amp;quot;color: green;&amp;quot;&amp;gt;group velocity&amp;lt;/span&amp;gt;'') ''Fís[[Category:Física]].'' Velocidad media con la que se desplaza un grupo de ondas. Viene dada por la fórmula ({{bf{v}}_{rm{g}}} = {nabla _{bf{k}}}omega {kern 1pt} ({bf{k}})), donde (omega {kern 1pt} ({bf{k}})) es la relación de dispersión. Es generalmente distinta de la velocidad de fase ({{bf{v}}_{rm{f}}} = left( {omega {kern 1pt} ({bf{k}})/k} right)widehat {bf{k}}).&lt;/div&gt;</summary>
		<author><name>Maintenance script</name></author>	</entry>

	</feed>