Explain atomic line spectra in terms of

transitions between discrete energy levels.

Eupper - Elower = h*(frequency)

= h*c/(wavelength)

Each energy level has a certain atom energy associated with its electron orbits. A photon of light with a specific energy is emitted or absorbed when a transition occurs between levels. Total energy remins conserved.

h = Planck's constant,
6.02*10^-34 joule*second