In an alternate universe, electron energies in an atom are found to obey the
following equation where n is the principle quantum number:
E = 3.0 x 10^(-19) J * nm * (1/n^2)
..where n is the principle quantum number
A gas discharge lamp, like the lamps used in lab, contains only atoms
from the alternate universe. You turn the lamp on and observe the
spectrum. Two energy transitions that occur within the visible spectrum
(400-700 nm), provide the wavelength of the photon and corresponding
energy levels that produce the photon.
...Where do I even begin?