Toss Up - Chemistry - Multiple Choice

According to Beer’s law:
W) the energy of a photon of light is inversely proportional to its wavelength
X) the concentration of a species that absorbs light can be measured by the amount of light absorbed
Y) the energy of characteristic X-rays increases with increasing atomic number of the emitting element
Z) excitation of the electrons in a molecule takes place on a shorter time scale than motion of the nuclei