Interactions between Light and Matter
Energy is always conserved in nature. If an electron in an atom makes an upward transition, it gains (absorbs) energy.
Therefore something else must lose energy. Conversely, if the electron makes a downward transition, it must release
(emit) energy that something else gains.
Typically in astronomy, light provides or carries away the energy difference, AE. A photon is a particle of light with a
specific energy, wavelength, and frequency.
Write a proportionality relation between the energy. E, of a photon and its wavelength, A, and describe these properties
in words. The are E da phatan is inversely proportional