Atoms And Nuclei Question 127
Question: When the wave of hydrogen atom comes from infinity into the first orbit then the value of wave number is [RPET 2003]
Options:
A) 109700 $ cm^{-1}$
B) 1097 $ cm^{-1}$
C) 109 $ cm^{-1}$
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
Wave number $ \bar{\nu }=\frac{1}{\lambda }=R,[ \frac{1}{n_{1}^{2}}-\frac{1}{n_{2}^{2}} ];$
$n_{2}=\infty $
and $ n_{1}=1 $
$ \Rightarrow \bar{\nu }=R=1.097\times 10^{7}{{m}^{-1}}=109700\ c{{m}^{-1}} $
BETA
