Atoms And Nuclei Question 434
Question: The wavelength of light emitted from second orbit to first orbits in a hydrogen atom is
Options:
A) $ 1.215\times {{10}^{-7}}m $
B) $ 1.215\times {{10}^{-5}}m $
C) $ 1.215\times {{10}^{-4}}m $
D) $ 1.215\times {{10}^{-3}}m $
Show Answer
Answer:
Correct Answer: A
Solution:
- Energy radiated $ E=10.2,eV=10.2\times 1.6\times {{10}^{-19}}J $
$ \Rightarrow $ $ E=\frac{hc}{\lambda } $
Þ $ \lambda =1.215\times {{10}^{-7}}m $
