Dual Nature Of Light Question 103
Question: The $ {K_{\alpha }} $ X-ray emission line of tungsten occurs at $ \lambda =0.021 $ $ nm $ . The energy difference between K and L levels in this atom is about [IIT 1997 Cancelled]
Options:
A) 0.51MeV
B) 1.2 MeV
C) 59 KeV
D) 13.6 eV
Show Answer
Answer:
Correct Answer: C
Solution:
$ E_{K}-E_{L}=\frac{hc}{\lambda } $ $ =\frac{(6.6\times {{10}^{-34}})(3\times 10^{8})}{(0.021\times {{10}^{-9}})(1.6\times {{10}^{-19}})}eV $ =59keV
BETA
