Commit 9db1193c authored by Claude Meny's avatar Claude Meny

Update cheatsheet.fr.md

parent 141c76f8
Pipeline #15873 failed with stage
......@@ -1204,6 +1204,9 @@ $`=\sqrt{A_1^2 +A_2 + 2\,A_1A_2\,cos\,(\theta_1 -\theta_2)}`$
#### Qu'est-ce que le principe de Fresnel-Huygens ?
![]( waves-fresnel-huygens-principle-2_L1200.jpg)
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* Enoncé :
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