Radiation coming from transitions 
to 
of hydrogen atoms fall on 
ions in n = 1 and n = 2 states. The possible transition of helium ions as they absorb energy from the radiation is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Energy released by hydrogen atom for transition 
to 
This energy is absorbed by 
ion in transition from 
to 
(say)
So, possible transition is 
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