It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power “n” i.e., \( \nu^n \) of X-rays emitted is plotted against atomic number “Z”, following graph is: The value of “n” is
\( 3 \)
\( 2 \)
\( 1 \)
\( \frac{1}{2} \)
