A) few lines in Balmer and Lymen series
B) all the lines in Balmer series
C) few lines in Balmer series
D) Balmer series only
E) None of the above
Correct Answer: A
Solution :
We known that as the photon is to be observed completely. So, electron energy after collision will be \[-13.6\,\,eV+12.1\,\,eV=1.5\,\,eV\] This means electron can go to third orbit only. Therefore, transitions \[3\to 2,\]\[2\to 1\]and \[3\to 1\] are possible. So, few spectral lines in Balmer and Lyman series are possible.
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