In the following article, the author theoretically proved that during a threshold frequency of electromagnetic radiation equal to Planck’s frequency, this radiation, under the influence of the force of gravity between photons, will stop. The energy will transform itself into so-called ‘dark energy’. This ‘dark energy’ affects gravity, yet it does not move, or does not oscillate in the real sense of the term. Another observation regarding gravitational energy is that it is dependent upon the ratio of Planck’s length and the distance between two interacting objects, as well as the ratio of the multiplied energies of two interacting particles to Planck’s energy, which are a part of the constants of nature. Further results can be obtained through further theoretical and practical research.