A) \[{{Z}^{2}}\]
B) \[{{(Z-1)}^{2}}\]
C) \[\frac{1}{(z-1)}\]
D) \[\frac{1}{{{(z-1)}^{2}}}\]
Correct Answer: D
Solution :
From Moseley's law\[\sqrt{v}=a(z-b)\] For \[{{K}_{\alpha }}\]line, \[b=1\]\[\therefore \]\[v={{a}^{2}}{{(z-1)}^{2}}\] or \[\frac{c}{\lambda }={{a}^{2}}{{(z-1)}^{2}}\] or \[\lambda =\frac{c}{{{a}^{2}}{{(z-1)}^{2}}}\]or \[\lambda \propto \frac{1}{{{(z-1)}^{2}}}\] Hence, the correction option is [d].
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