diff --git a/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md b/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md
index c916e5e47..574fd7a06 100644
--- a/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md
+++ b/01.curriculum/01.physics-chemistry-biology/04.Niv4/04.electromagnetism/02.electromagnetic-waves-vacuum/02.electromagnetic-waves-vacuum-main/textbook.fr.md
@@ -303,11 +303,11 @@ sens de propagation* de l'onde,<br> et *$`k`$*$`=||k||`$ est le
 ---------------------------
 Propriétés de l'onde EM plane progressive monochromatique dans le vide :
 
-* **$`\overrightarrow{k}\land\overrightarrow{E}=\omega\overrightarrow{B}`$**<br>
-<br>
-$`\Longrightarrow`$ (\overrightarrow{k},\overrightarrow{E},\overrightarrow{B}) forment un trièdre direct.<br>
-<br>
-$`\Longrightarrow ||\overrightarrow{B}=\dfrac{\overrightarrow{E}}{c}`$
+* **$`\overrightarrow{k}\land\overrightarrow{E}=\omega\overrightarrow{B}`$**
+
+$`\hspace{0.6cm}\Longrightarrow (\overrightarrow{k},\overrightarrow{E},\overrightarrow{B})`$ forment un trièdre direct.
+
+$`\hspace{0.6cm}\Longrightarrow ||\overrightarrow{B}=\dfrac{\overrightarrow{E}}{c}`$
 
 --------------------------