question_answer

In X-ray spectrum wavelength l of line \[{{K}_{\alpha }}\] depends on atomic number Z as                          [RPMT 1995; DCE 2002]

A)            \[\lambda \propto {{Z}^{2}}\]                                          

B)            \[\lambda \propto {{(Z-1)}^{2}}\]

C)            \[\lambda \propto \frac{1}{(Z-1)}\]                               

D)            \[\lambda \propto \frac{1}{{{(Z-1)}^{2}}}\]