In two earlier studies, we demonstrated that due to the enormous accelerations arising during the perpendicular reflection of a photon by a mirror, the photon’s energy distribution behaves as a quadrupole, thereby generating a graviton (or gravitational wavelet) at the same frequency and direction as the reflected photon. For simplicity, only the contribution of the quadrupole component Qxx was previously considered. Here, we extend the analysis to include all quadrupole components associated with perpendicular photon reflection. By applying the standard Einstein quadrupole radiation formula, we show that the energy of the emitted graviton scales as ν3, revealing a direct coupling between electromagnetism and gravitation. This finding is of high importance because it challenges the long-standing but unverified assumption that graviton energy depends linearly on frequency (ν1). Our results establish that quantum gravity theories must instead incorporate cubic frequency dependence. Another remarkable feature of the proposed framework is that it offers a theoretical connection between general relativity and quantum approaches, suggesting that confined electromagnetic radiation can serve as a direct source of high-frequency gravitational wavelets.