Is the energy of the photon coming in greater than or less than the energy of the electronic transition?
Neither. It has the energy given by the difference in energy,
When photons are absorbed to excite an electron from initial energy
Suppose you wanted to go from
#E_"photon" = DeltaE = -"13.6 eV"(1/2^2 - 1/1^2)#
would be the energy that the one absorbed photon needs to be in order to get the electron from
If you had