4. Choose the correct answer The law Moseley is __ sqrt (v)=A(Z-B) Phi =kIU^2Z mu _(m)=klambda ^3Z^3 Phi =Phi _(0)e^-mu x

The correct answer is: $\sqrt {v}=A(Z-B)$<br /><br />The law of Moseley states that the square root of the atomic number (Z) is proportional to the atomic weight (A) minus a constant (B). This relationship is expressed by the equation $\sqrt {v}=A(Z-B)$, where v represents the atomic number and A and B are constants.