diff --git a/01.courses/01.optics/03.the-nature-of-light/02.cheatsheet/cheatsheet.fr.md b/01.courses/01.optics/03.the-nature-of-light/02.cheatsheet/cheatsheet.fr.md
index 025fcd13e..b8a8b9127 100644
--- a/01.courses/01.optics/03.the-nature-of-light/02.cheatsheet/cheatsheet.fr.md
+++ b/01.courses/01.optics/03.the-nature-of-light/02.cheatsheet/cheatsheet.fr.md
@@ -175,7 +175,8 @@ pour un ce miroir, <strong>selon les positions de A et B :</strong>
 <li><strong>Plusieurs extrema</strong> : ici <ins>2 maxima</ins> et <ins>1 minimum</ins><br>
 <strong>$\Longrightarrow$ plusieurs rayons</strong> issus de A passent par B : ici <ins>3 rayons</ins></li></ul>
 
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+<iframe id="Axe_opt" src="https://www.geogebra.org/material/iframe/id/syegm6gp" height="auto"></iframe>
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