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Rayonnements - Énergie initiale, effet photoélectrique


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Coucou @HUGOO

 

Alors pour cet item il faut que tu utilises la formule n = Ec / Ē avec n = nombre d'ionisations , Ec = l'énergie initiale et Ē = l'énergie moyenne d'ionisation d'un milieu ( 32 eV pour l'eau ) 

 

Tu isoles ce que tu cherches, l'énergie initiale donc et tu obtiens Ec = n x Ē = 5000 x 32 = 160 000 eV donc 160 keV 

 

Bon courage ❤️

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