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An electron in the d energy state level of a hydrogen atom is placed in an...

An electron in the d energy state level of a hydrogen atom is placed in an external magnetic field. It is observed that a photon of energy 1968 μeV is emitted when the electron transition from the maximum to the minimum energy state.

a) Sketch the energy level diagram before and after the presence of the magnetic field.

b) What is the intensity of the external magnetic field?

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