In an investigation of the electronic absorption spectrum of a particular element, it is found that a photon having λ = 500 nm provides just enough energy to promote an electron from the second quantum level to the third. from this information, we can deduce select one:
a. the energy of the n = 2 level
b. the energy of the n = 3 level
c. the sum of the energies of n = 2 and n = 3
d. the difference in energies between n = 2 and n = 3
e. all of these