Photon(s) See also: Quantum Theory Photon or Light quantum, the particle composing light and other forms of Electromagnetic Radiation. The Photoelectric Effect and Blackbody Radiation can be explained only by assuming that light Energy is transferred in discrete packets, or photons, and that the energy of each photon is equal to the Frequency of the light multiplied by Planck's Constant (h). Thus, the higher the frequency the higher the energy. Light imparts energy to a Charged particle when one of its photons collides with the particle.