Consider the H2 molecule. The two protons have spin 1/2 and can be in a state for which the total spin is S = 0 or S = 1. (a) What is the orbital angular momentum of the two protons system in the lowest energy state for the two possible values of the total spin. (b) Find the wavelength of the radiation emitted in the transition from the lowest rotational excitation in these two cases.

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