Moseley measured the frequency $(f)$ of the characteristic $X$-rays from many metals of different atomic number $(Z)$ and represented his results by a relation known as Moseley's law. This law is ($a, b$ are constants)
- A$f = a(Z - b)^2$
- B$Z = a(f - b)^2$
- C$f^2 = a(Z - b)$
- D$f = a(Z - b)^{1/2}$
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