Verified Solution • 2025–26 Session moderate

QPages 395-396: Q16: HC Verma: Concepts of Physics - Volume 2 X-Rays Pages 395-396: Q16 Solution: The X-rays from certain elements are given below. Draw a…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often take the square‑root of the given keV values and plot $sqrt{E}$ versus $Z$, forgetting that Moseley’s law involves the frequency $ u$ ($ u=E/h$). Always convert the energy to frequency (or include the constant $1/\sqrt{h}$) before taking the square‑root to obtain a correctly scaled linear plot.

The KβK_\beta X-rays from certain elements are given below. Draw a Moseley-type plot of ν\sqrt{\nu} versus Z for KβK_\beta radiation. Element | Ne | P | Ca | Mn | Zn | Br; Energy keV) | 0.858 | 2.14 | 4.02 | 6.51 | 9.57 | 13.3.

Step-by-Step Verified Solution

**Answer:** Moseley-type plot of �_ versus Z for K_beta radiation. **Step-by-Step Explanation:** Given data: Ne (Z=10): 0.858 keV, P (Z=15): 2.14 keV, Ca (Z=20): 4.02 keV, Mn (Z=25): 6.51 keV, Zn (Z=30): 9.57 keV, Br (Z=35): 13.3 keV. Using E = h_, calculate _ for each. Plot �_ on y-axis and Z on x-axis. The plot should be linear according to Moseley's law [citation:1].

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