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Wave Optics

Question
CBSEENPH12038589

What are the values of first and second excitation potential of hydrogen atom?

Solution
Excitation potential is the amount of energy required in electron volt to excite the atom from it's ground state to a higher state. 
When there is transition from n=1 to n=2 we will have first excitation potential.  

For hydrogen atom,
First excitation potential = -3.4 - (-13.6) eV= 10.2 eV 

When electron jumps from n=1 level to n=3 level, we will have second exciation potential.

Second excitation potential = - 1.5 - (-13.6)= 12.09 eV.