Q. The energy of the em waves is of the order of 15 keV. To which part of the spectrum does it belong?
A) γ-rays
B) X-rays
C) Infra-red rays
D) Ultraviolet rays
Explanation
[Solution] $\lambda = \frac{12400}{15000}$ Å ≈ 0.83 Å, which lies in the X-ray region. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.