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M3P2
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d218940e
Commit
d218940e
authored
Jan 28, 2021
by
Claude Meny
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Update cheatsheet.fr.md
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d218940e
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@@ -374,8 +374,7 @@ critère pour quantifier la largeur d'un maximum principal.
Faisons croître le nombre $`
N
`$ des ondes qui interfèrent, et observons :
<!-- pour le site, sera en .gif -->


#### L'ordre d'observation d'un réseau de diffraction
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@@ -389,8 +388,6 @@ $`\phi=\dfrac{2 \pi \, \delta}{\lambda}`$.
Deux longueurs d'onde différentes donneront deux systèmes de franges différentes, qui se superposeront.
À terminer

_Pour N=2, tous les pics principaux ont une même hauteur.
Ce n'est pas cas lorsque N croît cas cette figure à cause du pas
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