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COURS_04_-Intensité_sonore.tex
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@ -281,7 +281,7 @@ l'énergie de la source.
\subsection{Exercices}
\subsubsection*{Exercice 11}
\subsubsection{Exercice 11}
Une source lumineuse isotrope a une puissance de 100 \si{w}. Quelle est l'intensité sonore de l'onde captée à 120 \si{m} de la source?