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      <description>Collège Françoise Giroud Classe de 5ème</description>
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         <title>La Madeleine au miroir</title>
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         <description><![CDATA[<div>Goerges de La Tour</div>]]></description>
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         <title>Application sur les sources de lumière</title>
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         <title>Comment classer les sources de lumière ?</title>
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         <description><![CDATA[<div>Il existe deux types de sources lumineuses :<br>&nbsp;Celles qui produisent leur propre lumière : <br>ce sont des <strong>sources primaires de lumière</strong><br> Celles&nbsp; qui diffusent (c’est-à-dire qui <br>renvoient dans toutes les directions) la lumière :<br>Ce sont des <strong>objets diffusants&nbsp;<br>(ou sources secondaires)</strong></div>]]></description>
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         <title>Vocabulaire</title>
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         <title>Comment se propage la lumière ?</title>
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         <description><![CDATA[<div>Dans un milieu transparent et homogène : <strong>la lumière se propage en ligne droite</strong></div>]]></description>
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         <pubDate>2016-08-30 20:04:24 UTC</pubDate>
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         <title>Comment schématiser la lumière ?</title>
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         <pubDate>2016-09-04 18:32:21 UTC</pubDate>
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         <title>Rendre la lumière visible</title>
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         <title>A quand le sabre laser ?</title>
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