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M3P2
Courses
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40553da0
Commit
40553da0
authored
Sep 30, 2024
by
Claude Meny
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Update cheatsheet.fr.md
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40553da0
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@@ -97,7 +97,9 @@ RÉSUMÉ
__Le décalage Doppler__ : décalage observé entre la mesure de la durée de la pertubation
ou de sa fréquence (onde harmonique), effectuée au niveau de la source d'émission
et au niveau du capteur qui détecte l'onde.
__Les battements__ :
__Les battements__ : la superposition de deux ondes harmoniques de fréquences proches $
`\nu_1\sim\nu_2`
$
se traduit par une onde de basse fréquence $
`|\,\nu_1 - \nu_2\,|`
$ facilement détectable, modulée à
la haute fréquence $
`(\nu_1 + \nu_2)\2`
$.
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