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Qcm avec CDA (couche de demi-atténuation)


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Posted (edited)

Salut,

 

Alors déjà la CDA est ce qui laisse passer que la moitié (1/2) des photons. Ici l'écran de plomb correspond à 5x la CDA du faisceau de photons, ce qui laisse passer (1/2)^5 (c'est un demi exposant 5) photons. Or (1/2)^5=1/32, donc il n'y a qu'1 photon sur 32 qui passe.

 

Dis moi si tu as bien compris et n'hésites pas à reposer des questions!

 

Force à toi

Edited by inoxtat

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