Q. According to Moseley’s law of $X$-rays the frequency $(v)$ of particular characteristic $X$-ray and the atomic number $(Z)$ of the element depend on each other as
A) $\sqrt{v} = kZ^{2}$
B) $\sqrt{v} = \frac{k}{Z^{2}}$
C) $v = kZ$
D) $\sqrt{v} = kZ$
Explanation
(d) According to Moseley’s law, when $\sqrt{v}$ is plotted against $Z,$ one gets a straight line. $v$ is the frequency of the $X$-ray lines. $v \propto Z^{2}$ or$\ \sqrt{v} \propto Z$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.