Atoms And Nuclei Question 65
Question: Ionization energy of hydrogen is 13.6 eV. If $ h=6.6\times {{10}^{-34}}J- $ sec, the value of R will be of the order of [RPMT 1997]
Options:
A) $ 10^{10}{{m}^{-1}} $
B) $ 10^{7}{{m}^{-1}} $
C) $ 10^{4}{{m}^{-1}} $
D) $ {{10}^{-7}}{{m}^{-1}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ E=-Rch $ Þ $ R=-\frac{E}{ch}=-\frac{13.6\times 1.6\times {{10}^{-19}}}{3\times 10^{8}\times 6.6\times {{10}^{-34}}} $ $ =1.098\times 10^{7},per,m $
