Question
What is the energy in joules, required to shift the electron of the hydrogen atom from the first Bohr orbit to the fifth Bohr orbit and what is the wavelength of the light emitted when the electron returns to the ground state? The ground state electron energy is - 2.18 X 10-11 ergs
Solution
As ground state, electronic energy is 
When electron returns to ground state (i.e. to n = 1), energy emitted 
We know,
Substituting the values in the above expression
