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QCM 14 cc 2013


BOULETL
Go to solution Solved by Oli,

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  • Solution

Bonsoir, pour moi c'est bien faux car pour que le photon se désexcite il faut qu'il y ai eu excitation, or la valeur de la haute tension d'alimentation est fixée a 50Kvolts, La valeur de l'énergie nécessaire pour passer de la couche K à L est : 69.51-12.09 = 57.42

57.12 est supérieur à 50 donc c'est impossible.  

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