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  4. The graph that correctly represents the relation of frequency v of a particular characteristic X-ray with the atomic number Z of the material isThe graph that correctly represents the relation of frequency v of a particular characteristic X-ray with the atomic number Z of the material is

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Q. The graph that correctly represents the relation of frequency $v$ of a particular characteristic X-ray with the atomic number $Z$ of the material isThe graph that correctly represents the relation of frequency $v$ of a particular characteristic X-ray with the atomic number $Z$ of the material is

Nuclei

Solution:

By Moseley's law,
$\sqrt{v}=a(Z-b)$ or $v=a^{2}(Z-b)^{2}$
Comparing with the equation of a parabola,
$y^{2}=4$ ax, it conforms to graph $c$.