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3. Consider an electron of mass 9*10-31 kg in an infinite box of dimension 10-9 m....

3. Consider an electron of mass 9*10-31 kg in an infinite box of dimension 10-9 m.

a) What is the energy difference between the ground state and the first excited state in eV unit?

b) If there is a transition from n=2 to n=1 state, what will be the wavelength of the emitted photon?

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