Q. In X-ray spectrum wavelength $\lambda$ of line $K_{\alpha}$ depends on atomic number $Z$ as
A) $\lambda \propto Z^{2}$
B) $\lambda \propto (Z - 1)^{2}$
C) $\lambda \propto \frac{1}{(Z - 1)}$
D) $\lambda \propto \frac{1}{(Z - 1)^{2}}$
Explanation
The correct answer is Option D: $\lambda \propto \frac{1}{(Z - 1)^{2}}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.