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State how many point-charges form an electrical dipole moment. State the physical di- mension of an electric dipole moment. State the value of the dipole moment d12 with units.{3} State two rules that explain why this is the only relevant dipole matrix element when driving transitions from n= : 1 to n 2 with 7-polarized light.{2} This transition is driven by a laser with an intensity of I - 1 mW/cm2 and a normalized Lorentzian spectral profile (which already includes the broadening of both laser and atomic transition) 2 plv) (4.6) A 4(v – vo)2 + Av2 with a full width at half maximum of Av = 1 MHz. Calculate the maximal transition rate for a single hydrogen atom that is initially in its ground state, using the formula e2 (mf.eV.) Ip(v). (4.7) 2ħ-60C Use units throughout your numerical calculation, deriving also the result's units. Give a brief physical interpretation of this result for the case of a single atom. {5} Av = a W mn т