According to Moseley’s law, the frequency ($\nu$) of the $K_{\alpha }$ line and the atomic number (z) of the element have the relation (A and B) are constants

• A

  $\frac{\nu }{\left(Z-A\right)}=B$

• B

  $\frac{\sqrt{\nu }}{\left(Z-A\right)}=B$

• C

  $\nu (Z-A)=B$(Z–A) = B

• D

  $\nu$(Z–A)² = B