Let 
be the energy of the 
level of H-atom. If all the H-atoms are in the ground state and radiation of frequency 
falls on it, then
Text Solution
Verified by ExpertsThe correct answer is:
B
The given energy of n th level of hydrogen atom is 
Since all the H atom are in ground state (n = 1) then the radiation of given frequency 
falling on it may be absorbed by some of the atoms and move them to the first excited state (n = 2)
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